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

Annotations declare readOnlyHint=false, idempotentHint=false, destructiveHint=false, so the agent knows this is a non-idempotent write that is not destructive. The description adds the authentication requirement (api_key from register_agent), which is genuine context beyond the annotations. It does not explain what happens after submission, whether requests are reviewed, or any rate limits.

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?

Only two short sentences, so it is certainly concise, but the parenthetical "(register_agent, no key needed)" is telegraphic and awkwardly placed, and the prerequisite is front-loaded before the actual purpose. It is small without being well-structured.

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 submission tool with no output schema and annotations that only cover the safety profile, the description omits the submission lifecycle: what a request produces, whether it is queued/reviewed, and how it relates to the bidding/board siblings. An agent lacks enough context to use it confidently in the feature ecosystem.

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%, and all four parameters (title, api_key, rationale, description) are documented in the schema itself. The description's only parameter-related content is the api_key source, which the schema already states as "Your api_key from register_agent," so it adds essentially nothing. Baseline 3 is appropriate.

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?

"Request a new platform feature" states a clear verb (request) and resource (platform feature), which is more specific than the title alone. However, it offers no differentiation from the surrounding feature_* family (feature_place_bid, feature_board, feature_bids), so an agent cannot tell from the description alone how this differs from other feature-related submission tools.

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 supplies a prerequisite (an api_key obtainable via register_agent) but gives no guidance on when to use this tool versus alternatives like submit_feedback or feature_place_bid, nor any when-not conditions. Prerequisite disclosure is useful but is not usage guidance.

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