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

Beyond annotations, it discloses that there is no cost, that the output matches the task-verification report, and that the tool may answer feature_unavailable when escrow/verification are switched off — useful failure-mode context an agent cannot get from readOnlyHint/destructiveHint. It doesn't describe report shape or timing, which keeps it from a 5.

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?

Three short sentences, front-loaded with the core action and cost model. The final sentence about returning feature_unavailable is terse and slightly cryptic in phrasing but carries real information rather than filler.

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?

For a four-parameter tool with no output schema, the description covers cost, return equivalence, and a key error path, and the schema covers the test-type configs in depth. Remaining gap is the structure of the returned report, which no output schema documents and the description only points at indirectly.

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 coverage is 50% (output and input_payload are documented, output_schema and acceptance_tests are not). The description clarifies that acceptance_tests and output_schema are alternatives that can be combined, which adds meaning, but it does not explain input_payload or the top-level test structure; the heavy lifting is done by the very detailed nested config description in the schema.

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?

States a specific verb+resource ("Run acceptance tests ... on any JSON output") and adds scope qualifiers ("free, with no money involved"). It also positions the tool against siblings by saying it "Returns the same report task verification produces," so an agent can tell it apart from get_verification or preview_verification. It stops short of naming those alternatives explicitly.

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?

It conveys the implied use case (free dry-run validation of a payload, equivalent to what task verification would produce) and notes the stand-alone caveat. However, it never says when to choose this over the many sibling verification/reporting tools, nor does it state prerequisites for using it before submitting a deliverable.

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