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

Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=false, and openWorldHint=true. Beyond that, the description adds real behavioral value: the POST endpoint and the non-obvious side effect that linking to a suggestion "adds that user's support." This side effect is not derivable from the annotations.

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?

One dense sentence, front-loaded with the "WRITE:" tag and the core action, ending with the endpoint. Little waste, though the clause stacking makes it slightly heavy.

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?

No output schema exists, so the description carries return-value burden; for a create it defers reasonably to the endpoint. It covers the write, the side effect, and the endpoint, but could mention reversibility given destructiveHint=true.

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%, so body/source_url/user_email/suggestion_id are already documented. The description adds the semantic that suggestion_id linkage also confers the user's support, but otherwise restates the schema fields at the baseline level.

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 ("capture"/WRITE) and resource ("a piece of customer feedback"), and clarifies the two optional linkages (user by email, suggestion). It implicitly distinguishes itself from add_comment/add_note/add_suggestion by describing feedback capture rather than naming a sibling explicitly.

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 parenthetical "(for example from a call or ticket)" hints at when this applies, but there is no explicit when-not guidance or named alternative among the many sibling write tools. Usage is implied rather than spelled out.

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