Approve (id = action id)

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

Annotations only say readOnlyHint=false and openWorldHint=true, so the description earns credit for disclosing that this is a WRITE that is not executed unless confirm: true and that there is no server-side dry run. It still omits what the approval actually does downstream and whether it is reversible, keeping it below a 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?

Two compact sentences with the mutation warning front-loaded, and no filler. The repeated parenthetical from the title is slightly redundant but not costly.

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 write tool with no output schema, it covers the critical safety mechanic (confirm gate, no dry run) but says nothing about required permissions, what the returned preview contains, or side effects of approving. Adequate minimum, with clear gaps.

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 67%, with the undocumented parameter being id; the description fills exactly that gap by defining id as the action id. The confirm explanation largely restates the schema text, but the id clarification plus the execution gate adds real meaning beyond the structured fields.

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 and resource plus the underlying endpoint (POST /v1/approvals/{id}/approve), and clarifies that the id is an action id rather than an approval id. It does not explicitly distinguish itself from siblings like approvals_reject or approvalLinks_decide, so it stops short of a 5.

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?

There is no statement of when to approve versus reject, or when to use approvalLinks_decide instead. The only conditional guidance is the confirm flag, which is about execution mechanics, not tool selection.

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