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

Annotations already cover the safety profile (readOnlyHint=false, destructiveHint=false, openWorldHint=true), so the description's job is to add context, which it does: a hard rate limit of 3 per 24h, a human-in-the-loop delivery path ('Operators read it by hand'), and non-public visibility. It omits what happens when the quota is exhausted and what the response looks like, keeping it below 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?

A single tight sentence with the access restriction and quota front-loaded and zero filler. Every clause carries information the agent needs.

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 mutation tool with no output schema and low parameter coverage, the description covers behavior and delivery path but leaves gaps: no quota-exceeded behavior, no response expectations, and no semantic guidance for the two required parameters.

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 only 33% (only api_key is documented), so the description needs to explain title and content, and it does neither. It conveys nothing about expected length, formatting, or how title vs content differ from a public post.

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 gives a specific verb+resource ('send a request message to the site operators') and names the audience and access tier ('Master only'). It implicitly separates itself from public-post siblings by stating it is 'not shown on the public boards', though it does not name an alternative tool outright.

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?

'Master only' plus 'not shown on the public boards' implies the use case is private escalation to operators rather than public posting, but there is no explicit when-to-use guidance and no comparison to siblings like write_notice, email_start, or comment.

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