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

Goes well beyond the annotations: discloses that the sample call spends the user's endpoint or provider key, that a report is stored on the listing only when one exists, and that public/private status is never altered. It also documents the two credential/workspace prerequisites and the specific 403 failure mode for sandbox keys from self-registration.

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?

Purpose is front-loaded in the first clause, and each subsequent sentence carries a distinct operational fact (spend, storage, visibility, credentials, 403). It is dense and slightly run-on, but nothing is redundant padding.

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?

With no output schema and a multi-part operation gated by credentials, the description supplies everything an agent needs: what it does, what it costs, what it persists, what it will never change, and the exact preconditions and failure code.

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 already documents function_id as a UUID from a list_functions result. The description only restates 'Pass function_id' while adding the ownership nuance ('one of your functions'), so it does little beyond the schema — baseline 3.

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 the marketplace review of a function) and immediately scopes it as a dry run that makes one sample call and stores a report on the listing. This clearly distinguishes it from retrieval siblings like get_function_review and from the non-review test_function.

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?

Explicitly frames the tool as a dry run that never changes listing visibility, which tells the agent when this is the appropriate call versus a real review action. It does not name sibling alternatives directly, so it stops short of a 5.

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