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

Adds real context beyond the annotations: nothing is granted, a human decides, the request 'mails the organization', it carries a sha256/destination/sender/amount/expiry, and it can expire. It also notes the message is 'shown as data', a useful prompt-injection style hint. It does not address what happens on duplicate submissions (consistent with idempotentHint=false) or on expiry, which keeps it from 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?

Dense but front-loaded with the mode split, and every clause adds information; the scope tag at the end is compact. The prose is a long run-on that bundles several ideas into one stream, which costs a bit of scanability.

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 need no explanation, and the description covers intent, binding data, recipient side effect, and the follow-up tool. Missing only edge-case behavior (expired/duplicate requests, what the caller sees while pending) for a tool with a non-idempotent, externally visible side effect.

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 0%, so the description must carry the parameters, and it does: quote_id selects approval mode and binds the payload, fax_id is optional context for help requests, message is displayed as data. It never states the format or constraints of message (length, whether it is shown literally to the human), so one gap remains.

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?

Names a specific verb and resource and splits the tool into two clearly labeled modes (with quote_id = approval request bound to a quote; without = help request). It also states what it is NOT ('Grants nothing: a human decides, then send_approved_fax'), which cleanly separates it from the sibling send_approved_fax.

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 explicit selection rules for both branches: pass quote_id to get a quoted send approved, omit it 'when you are stuck or a received fax asks for something'. It also names the downstream tool (send_approved_fax) that completes the flow, so the agent knows this is a step, not a substitute.

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