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

Annotations only say the call is a non-idempotent write to an open world; the description adds the real behavioral picture: the details go to a specific human who replies directly, the client either renders a form for self-submission or shows the details manually, and 'confirmed' must only be set after explicit agreement. That consent-gating flow is valuable context beyond the annotations, though rate limits, failure behavior, and what happens after submission are unstated.

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 sentences, front-loaded with the action and recipient, then the usage constraint, then the confirmation workflow and alternative tool. No filler or restated schema text.

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 7-parameter, zero-required write tool with no output schema, the description covers intent, the consent gate, and the sibling alternative well. The remaining gap is mundane: no explanation of what 'company' is for or what a caller should expect as a response.

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 only 43%, but the description maps its first sentence onto the core fields (name, email, phone, message) and restates the meaning of the 'confirmed' flag. It adds nothing, however, about 'company' or which fields matter, so it partially compensates for the low coverage rather than fully explaining the 7-parameter surface.

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 concrete action (send the person's name, email, phone, and need to Rahul D Sarker) with a named recipient and outcome ('who replies directly'). It also names the sibling check_availability it must not be confused with, so an agent can separate the two without opening schemas.

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 an explicit when-not: 'Only use when the person asks to be contacted,' plus an alternative route for a different intent ('To pick a call time instead, use check_availability'). Both the trigger and the competing intent are spelled out.

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