fix(select): let a list/search query keep the tools that retrieve what it found - #147
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…t it found The verb gate drops every tool whose name-verb conflicts with the intent detected from the prompt. `find` / `search` / `lookup` are `List`, and `FETCH_*` / `GET_*` are `Read`, so "find the emails about X" removed every action that returns a message body before scoring began — leaving a surface that can enumerate ids and never retrieve one. Finding something and reading it are one task for the user and two verbs for the catalogue. `verbs_are_compatible` makes `List` accept a `Read` tool, in that direction only: a `Read` query stays narrow rather than pulling in every enumerating tool. Ranking still prefers the exact match. An exact verb hit keeps its +3; a merely compatible one earns +1, so enumerating tools lead a list query and the retrieval tool follows them instead of displacing them. Measured against a real 62-action Gmail catalogue, "Search the inbox for … and summarize sender, subject and date" goes from twelve `LIST_*` actions and no way to read a message, to keeping `FETCH_EMAILS` and `FETCH_MESSAGE_BY_MESSAGE_ID`. The pre-extraction ranking snapshot is updated: "list open PRs assigned to me" now also keeps `GITHUB_GET_A_PULL_REQUEST`, ranked last of the three, which is the intended shape of this change.
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📝 WalkthroughWalkthroughThe tool selector now treats ChangesVerb compatibility selection
Priority: ➖ Normal — Schedule the tool-selection change because it broadens List-query results to retain compatible Read tools while preserving exact-match ranking. Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to List queries may rank a compatible retrieval tool ahead of the intended listing tool when its text overlap is higher, changing selected tool behavior. Exact verb precedence should be made unconditional or covered for unequal overlap scores before merge. Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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$0.0106 · 63,684 in / 1,911 out · 13,244 cached (21%) · openrouter/openai/text-embedding-3-small, deepseek/deepseek-v4-flash, z-ai/glm-5.2 · 284 embedded
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description: $0.0001 · 5,000 in / 64 out · 4,864 cached (97%) · deepseek/deepseek-v4-flash
How this change flows4 changed behaviours across 14 relationships. 6 surrounding behaviours are shown (60 graph nodes walked). 34 further behaviours left out to keep the diagram readable. flowchart LR
n0["rank_tools_by_prompt<br/>changed"]:::changed
n1["weighted_overlap<br/>changed"]:::changed
n2["delete_query_excludes_create_tools<br/>changed"]:::changed
n3["...order_matches_the_pre_extraction_snapshot<br/>changed"]:::changed
n4["take"]:::impacted
n5["github_sample"]:::impacted
n6["detect_verbs"]:::impacted
n7["ToolVerb"]:::impacted
n8["query_tokens"]:::impacted
n9["tool_verb"]:::impacted
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classDef changed fill:#0d4429,stroke:#238636,color:#e6edf3
classDef impacted fill:#161b22,stroke:#6e7681,color:#c9d1d9
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Green: changed behaviour. Grey: surrounding behaviour. Arrows name the call, use, implementation, or test relationship. Orange: has findings. Red: has a finding that blocks the merge. |
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In `@crates/tinyagents-harness/src/tool/select/mod.rs`:
- Line 361: Update verb_bonus and the associated ranking logic so exact verb
matches always outrank compatible matches, regardless of overlap score; preserve
the existing bonus values where possible and add a regression test covering a
compatible match with at least three additional overlap points.
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The two bonuses differ by 2, so a compatible `Read` tool whose name the query matches can outrank an exact-verb `List` tool that matches nothing else. That is the ranking working — a name hit is worth 3 and is the stronger relevance signal — but nothing said so. Two tests now bracket the behaviour: with a name-overlap advantage the compatible tool leads, and with overlap equal the exact verb decides.
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Summary
A
Listquery no longer gates out everyReadtool, so a search prompt can reach the thing it searched for.ListandReadbecome compatible intents, in that direction only, and an exact verb match still outranks a merely compatible one.Problem
The verb gate drops any tool whose own name-verb conflicts with the intent detected from the prompt.
find/search/lookup/browseareList;FETCH_*/GET_*/READ_*areRead. So "find the emails about X" removes every action that returns a message body before scoring begins, and the surviving surface can enumerate ids while having no way to retrieve one.Measured against a real 62-action Gmail catalogue, top-K 12:
Search the inbox for job opportunity emails … summarize sender, subject and dateGMAIL_LIST_*, no way to read a messageGMAIL_FETCH_EMAILS+GMAIL_FETCH_MESSAGE_BY_MESSAGE_IDshow me new emails about job opportunitiesFETCHGMAIL_FETCH_EMAILSFinding something and reading it are one task for the user and two verbs for the catalogue. That mismatch is the whole defect.
Solution
verbs_are_compatible(query, tool)— exact match, plus the single cross-verb pairList → Read. One direction only: aReadquery ("read message 5") stays narrow rather than pulling in every enumerating tool.verb_bonustiers the signal rather than flattening it:+3for an exact intent match,+1for a merely compatible one,-2for a conflict, so enumerating tools still lead a list query and the retrieval tool follows them instead of displacing them.What this does not fix
A prompt with no token overlap at all —
find job opportunities from the last 5 days— still ends up with twelveLIST_*actions: they score+3on the exact verb whileGMAIL_FETCH_EMAILSscores+1on compatibility alone, so the budget fills before it is reached. That is the separate defect that a flat verb bonus lets zero-overlap tools qualify at all (score > 0).Worth recording for whoever takes that one: requiring at least one token hit before a tool can qualify backfires for a downstream host that falls back to the unfiltered catalogue when hits drop below
MIN_CONFIDENT_HITS— nearly every Gmail action has zero overlap with that prompt, so the requirement empties the result and hands the model all 62 dense schemas instead of 12. Any fix there has to consider what the host does with a thin result.Tests
a_list_query_keeps_the_tool_that_retrieves_what_it_found— the property this change exists for.an_exact_verb_match_still_outranks_a_merely_compatible_one— compatibility must not promote aReadtool above an exactListmatch.compatibility_is_one_directional_and_narrow—List → Readonly; not the reverse, and nothing else pairs.ranking_order_matches_the_pre_extraction_snapshotupdated: "list open PRs assigned to me" now also keepsGITHUB_GET_A_PULL_REQUEST, ranked last of the three, which is the intended shape.cargo test -p tinyagents-harness --lib→ 928 passed, 0 failed (theworkspace::gitmodule is excluded locally: it spawns realgit commit, which blocks on this machine's GPG pinentry; it is untouched by this change).Summary by CodeRabbit