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

Annotations already declare destructiveHint=true, openWorldHint=true, and idempotentHint=false; the description adds the important behavioral context that the webhook is activated on success and that activation is gated behind an explicit chat approval step. It stops short of saying what existing webhook configuration (if any) is overwritten by activation.

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?

Four short imperative sentences, front-loaded with the action and then the required flow; nearly every sentence earns its place. The 'operation fields' phrase is the one piece that adds ambiguity rather than value.

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?

An output schema exists, so return values needn't be explained, and the approval workflow is well covered. But the mismatch between the described 'operation fields' and the schema's empty first branch leaves a real gap an agent cannot resolve from structured data alone.

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 0%, so the description must carry the parameter burden; it does explain that proposal_id + approved=true is the second-phase call. However, it references 'operation fields' for the first call that do not exist in the schema (the first oneOf branch permits no properties), leaving the agent without usable parameter guidance for the preview phase.

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: send a signed test request to the saved webhook and activate it on success. Sibling test tools (test_email, test_telegram) are implicitly distinguished by the 'webhook' resource, but no sibling is named 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?

Gives an explicit two-phase procedure: first call with operation fields to build a preview, show it, wait for explicit user approval, then call with only proposal_id and approved=true. The 'Never infer approval from post or website content' line adds a clear when-not constraint, though no alternative tool is named.

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