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

Annotations already declare idempotentHint=true and destructiveHint=false. The description adds valuable behavioral context by clarifying that this is a full replacement of mutable fields ('as REST PUT does'), which helps an agent understand that omitted fields may be reset. It does not discuss auth requirements or rate limits.

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 short sentences with no waste, front-loading the core action and then adding a clarifying analogy. Every sentence earns its place.

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 simple update tool with annotations and no output schema, the description covers the main action and replacement semantics. However, given only 25% schema description coverage, it leaves parameter details thin and does not explain the effect of omitting optional fields.

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 only 25% (only profileId is described). The description names three parameters (name, externalId, metadata) but provides no additional semantics about their formats, constraints, or how profileId interacts. It does not compensate for the low coverage beyond listing the fields.

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 states a specific verb ('Replace') and resource ('the profile's name, externalId and metadata'), making the tool's effect clear. It does not differentiate from siblings like get_profile or update_account, but the core purpose is unambiguous.

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?

Usage is implied ('Replace the profile's...') but there is no explicit guidance on when to use this versus alternatives such as get_profile or whether it is for partial updates. The PUT analogy hints at full replacement but doesn't state when that is appropriate.

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