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

Annotations already cover the safety profile (readOnlyHint=true, openWorldHint=false), and the description adds real context beyond them: a paid tier with Bearer API key auth, the exact checklist domains returned, and a verification level per item. It does not discuss rate limits or result size, but the auth requirement is exactly the kind of disclosure annotations cannot carry.

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 dense but well-ordered sentence block: access tier first, then scope, then contents, then the independent-guidance disclaimer. Almost every clause carries information; the vendor-affiliation disclaimer is marginally useful given PREMIUM framing.

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, the description steps in by listing the checklist areas plus 'config surfaces and a verification level', giving the agent a reasonable picture of the return shape. Missing only the sibling routing and any clarity about the stack enum values; annotations handle the read-only safety profile.

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 carry the parameter meaning, and it only offers 'one agent stack' to explain the required 'stack' enum of 24 product values. That establishes cardinality and scope but not what qualifies as a valid stack or how enum values map to checklist content.

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 (hardening checklist for one agent stack) and enumerates the covered domains: key rotation, OAuth revocation, plugin review, approval gates, logging. It is clear what the tool returns, but it never distinguishes itself from the close sibling check_my_stack or get_advisory, so an agent must guess which one fits.

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?

'For one agent stack' implies a scope but gives no when-to-use condition and names no alternative. Siblings check_my_stack and get_advisory plausibly overlap, and nothing here tells the agent which to pick or when this tool is inappropriate. Only the PREMIUM/Bearer prerequisite hints at a calling precondition.

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