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

Goes well beyond the annotations (readOnlyHint=false, openWorldHint=true, idempotentHint=false, destructiveHint=false) by disclosing the double opt-in flow: the guest gets a confirmation email and the family sees nothing until the guest confirms. It also clarifies that no booking or payment results, which is exactly the kind of consequence detail an agent needs before writing.

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 scope, then the consent precondition, then the confirmation flow. No filler and no repetition of schema field names beyond what the precondition requires.

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 13-parameter open-world write with no output schema, the description covers the essential mechanics: consent, double opt-in, and non-binding outcome. It could add what the agent receives back (e.g., that a confirmation is pending) to be fully self-sufficient.

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 69% and the schema itself documents name, dates, message, language, apartment_type, and guest_consent, so the description's mention of name/email/consent is largely reinforcing existing structure. It adds no meaning for the undocumented parameters (email, phone, adults, children), which is the appropriate baseline when the schema carries most of the weight.

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 ("Send a NON-BINDING inquiry to the Amrusch family on behalf of the guest") and immediately signals the write/non-committal nature, which distinguishes it from the read-oriented siblings check_availability, find_available_dates, and get_property_info.

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 a clear gating condition — only use when the guest has explicitly agreed and supplied name and email — plus the negative scope "No booking and no payment is made." It does not explicitly tell the agent to run check_availability or find_available_dates first, which is the one obvious missing routing hint.

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