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

Annotations already declare non-read-only, idempotent, non-destructive, closed-world behavior; the description adds the field-level mutation scope (only name fields), the immutable fields, and the required permission and account prerequisite. It does not describe the response or any failure mode, but that is a minor gap for a simple mutation.

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?

Front-loads the action and affected fields in the first clause, then appends scope exclusion and permission/prerequisite metadata. Compact and mostly waste-free, though the bracketed prerequisite block is slightly cluttered.

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 two-parameter mutation with no output schema, the description covers what changes, what cannot change, the required permission, and the account prerequisite. Only the return behavior/confirmation is unaddressed, which is a small omission.

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% for both parameters, so the schema supplies only types and length bounds. The description compensates by naming the two changeable fields in prose ('first and last name'), but adds no format, normalization, or validation guidance beyond that mapping.

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 (Change) and the exact resource fields affected (first and last name of the account), distinguishing it from the read-side sibling gpucloud_get_profile. It also enumerates what is explicitly out of scope (email/password), so an agent can identify the operation without opening 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 clear exclusions ('Email and password cannot be changed through MCP') and a prerequisite/permission note (profile:write, requires an account and MCP key). It does not explicitly name the get_profile sibling as the read counterpart, so it stops short of full alternative routing.

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