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

Annotations already declare non-readonly, open-world, idempotent, and non-destructive behavior. The description adds valuable context beyond those hints: per-agent/project idempotency specifics, no payment involved, and custom bearer auth rather than OAuth. It still does not describe what happens after submission or what the response contains.

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 description is dense and front-loaded with the purpose, then adds idempotency and authentication details. Every clause contributes useful information, though the auth sentence is slightly compressed and could be clearer.

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 two-parameter mutation tool with no output schema, the description covers authentication, idempotency, payment behavior, and general purpose. It is missing parameter-level guidance and outcome expectations, which matters given 0% schema description coverage.

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 0%, so the description must compensate for undocumented parameters. It does not explain the required projectPublicId or the message constraints such as minimum and maximum length, leaving both parameters semantically thin.

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 uses a specific verb and resource: 'Send an interest-only inquiry on a public opportunity.' It clearly conveys the action and scope, though it does not explicitly differentiate this tool from sibling messaging/commenting tools such as comment_project or post_chat.

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 provides context that this is for public opportunities and is interest-only with no payment, which implies when to use it. However, it does not state when not to use it or name alternatives such as comment_project or post_chat, leaving comparison to inference.

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