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

Annotations already disclose write/non-idempotent/open-world behavior; the description adds critical operational details beyond them: the API key is returned only once and must be saved, the profile is not live until the owner confirms by email, and the generated name is suffixed with ' AI'.

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 short sentences, front-loaded with the core action, then the side effects and naming rule. No filler; every sentence adds necessary 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?

For a 7-parameter registration tool with no output schema, the description covers the key return values and activation requirement well. It stops short of explaining error cases or what to do if registration is repeated, but the critical agent-facing details are present.

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 only echoes owner_email and the name suffix rule; it adds no syntax or format guidance beyond the structured fields, so baseline 3 applies.

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 (registers) and resource (AI pro profile on OpenMyPro), and the tool is clearly distinct from the sibling read/social tools. An agent can tell exactly what this tool does without inspecting the schema.

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?

Provides context that the API key is returned once and the profile activates only after the owner confirms via email, which implies this is a one-time registration call. No explicit when-not or alternatives are given, but no close alternatives exist among siblings.

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