Test Quality

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations present, the description carries the full behavioral burden and mostly delivers: it discloses the 5-match cap, the direct-confidence limitation, nested repository exclusion, and default compression. It is slightly less transparent about setup_trunk's side effects on the existing lint configuration, but 'automatically configures Trunk linting and enables recommended linters' does convey that it changes repo state.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The content is well-organized into actionable bullets and usage sections, and most sentences carry useful detail. However, there is noticeable redundancy: the 'Usage (short)' restates the action list, and the 5-match cap on unscoped find_tests is described twice. Trimming these would make it more concise.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

This is a multi-action tool with no annotations and no output schema, and the description is not enough on its own. It references repo_id, symbols, queries, and targeted path filters, but the schema only exposes action, max_tokens, and compress_payload; an agent cannot reliably determine how to provide the required inputs for find_tests or recommend_test_targets. Important return/result structure details are also absent.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the baseline is 3 and the description is not required to re-explain action, max_tokens, or compress_payload. The added prose references repo_id and symbol/query concepts, but those are not present in the input schema, so it makes parameter semantics somewhat ambiguous for an agent trying to construct valid calls.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description begins with a clear scope of code quality, testing, and lint control, then enumerates four concrete actions with specific verbs: coverage reports, find_tests discovers, setup_trunk configures, and recommend_test_targets recommends. It also differentiates itself from generic test-file discovery via grep_search, making it distinct within its sibling set.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly says to use this tool instead of grep_search, manual test file patterns, and manual test-to-code mapping, and gives a token-saving rationale. It also adds usage detail about scoped versus unscoped find_tests behavior. It does not fully articulate when NOT to use this tool versus the other synapse_* siblings, so it loses the top score.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.