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

Annotations (readOnlyHint=false, idempotentHint=true, openWorldHint=true) are reinforced rather than repeated: the description explains that calling again returns the existing link, that the result is publicly accessible to anyone, and that Free-plan calls return an upgrade note instead of a link. These are material operational facts not derivable from the structured fields.

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 sentences, front-loaded with the action and artifact, then the sharing risk, then the plan constraint. Every sentence carries distinct, actionable information with no 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 one-parameter tool with an output schema, the description covers everything the agent needs: the precondition (finished test), the side-effect profile, the public visibility, and the plan-dependent outcome. Return-value formatting is correctly left to the output schema.

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 100% and test_id is fully documented there, including the pattern and provenance from run_test. The description adds no syntax or format detail beyond what the schema provides, so the baseline 3 applies.

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 pair ('Create, or return the existing, public replay link for a finished Menso test') and immediately clarifies what the artifact is (a menso.io/r/... page showing steps and thoughts). An agent can distinguish this from get_findings/get_status/run_test without opening any schema.

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?

Clearly scopes usage to a 'finished' test and warns that sharing is deliberate because anyone with the link can view it, plus notes plan gating (Pro/Studio vs Free). It gives conditions but does not name a sibling alternative or expand on when *not* to request a link.

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