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

Adds real behavioral context beyond the annotations: Piku emails the brand a confirm link, the request only reaches the creator's Deals after confirmation, and the window is 48 hours, and it returns a request_id. It does not spell out what happens if the 48 hours lapse unconfirmed, nor warn that repeated calls each send another email (relevant given idempotentHint=false and destructiveHint=true).

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 sentences, front-loaded with the action and the asynchronous confirmation mechanism before the input list and return value. Every sentence carries information an agent needs; nothing is padding.

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 non-idempotent, destructive, open-world mutation with a nested object and no output schema, the description covers the asynchronous two-step confirmation, the 48-hour expiry, the required inputs, and the return value (request_id). Permissions details (e.g., whether the user must own the creator) are the only notable omission.

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?

With only 50% schema description coverage (handle and the nested brand fields are undocumented in the schema), the description usefully enumerates all required inputs — handle, Rate id, brand name, contact email, and a short brief. The phrase 'as the user gave them' adds non-obvious meaning: pass user-supplied values verbatim rather than fabricating them. It stops short of format/length guidance for handle or brand.

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: sending a brand's request on one Rate of a creator, which is distinct from sibling creation tools like create_invoice, create_quote, or design_page. It does not explicitly name an alternative tool or a boundary condition against those siblings, so differentiation is inferred rather than stated.

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?

Usage is implied by the phrasing ('on one Rate', needing a Rate id from get_rate_card) but there is no explicit when-to-use or when-not-to-use guidance, nor any reference to siblings such as design_page or send_draft. An agent could reason out the flow from the confirm-link explanation, but it must infer it.

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