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

Annotations declare destructiveHint=true and openWorldHint=true; the description goes further by disclosing the exact state change (draft→sent, accepted/rejected unchanged), the fact that the PDF is attached with the tenant template and signature, and the returned values. It doesn't address irreversibility of the send or failure cases, which is the remaining gap for a destructive/open-world tool.

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?

Three tight sentences: purpose and mechanism first, state semantics second, return values last. No filler and nothing redundant.

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 usefully states what comes back (recipient address and resulting status). For a destructive, open-world email action it could still mention failure modes or that sending is not undoable.

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 50%: 'message' is documented in the schema, 'quote_id' is not. The description compensates partially by explaining which quote states are meaningful, but adds no detail on the id itself (format, lookup, error behavior) beyond what the schema shows.

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 (email a quote with PDF attached) and the mechanism (tenant's own 'presupuesto' template and signature). It implicitly separates itself from mark_quote_sent via the status-transition note, but never names that sibling, so differentiation is inferred rather than explicit.

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 context of use (deliver a quote to its customer) is clear, and the state rule tells the agent that draft quotes will be moved to sent while accepted/rejected ones keep their status. However, no alternative is named and no exclusions or prerequisites (e.g. quote must have a customer email) are given.

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