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

Annotations indicate destructiveHint=true, and the description reinforces that 'This sends a real message to real people' and 'Notifies them (email + WhatsApp)'. It adds value by noting 'Works without an account' and advising user confirmation.

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 efficient sentences: first covers purpose and outcome, second provides a critical usage warning. No extraneous information.

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?

Adequate for a tool with 7 parameters and destructive side effects. Explains the outcome and prerequisites. Lacks explanation of return value or post-inquiry tracking, but output schema is absent so this is acceptable.

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 100%, so the schema already documents all parameters. The description does not significantly enhance parameter meaning beyond stating the notification method and that it works without an account, which is already implied.

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?

The description clearly states the tool sends an inquiry on behalf of the user to an advertiser, listing, project, or company. It distinguishes from siblings like 'reply_to_inquiry' by specifying it starts a new conversation.

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?

Explicitly states the tool is for sending inquiries and warns to confirm details with the user before calling. It does not directly compare to alternatives like 'reply_to_inquiry' but the context implies it is for initial contact.

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