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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It indicates a mutation ('Set') but does not explain whether the profile is fully overwritten, whether authentication via the 'pass' parameter is required, or what happens when only 'handle' or only 'card' is provided.

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?

The description is a single efficient sentence that front-loads the action and its targets with zero filler. It is genuinely concise, though the terseness contributes to the under-specification noted in other dimensions.

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?

The tool has three parameters, one nested object, no annotations, and no output schema, so the description must carry more weight. It leaves the authentication flow, merge-versus-replace behavior, and return value unexplained, which is inadequate for a mutating tool with this complexity.

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 67%: 'card' and 'pass' are already documented in the schema, while 'handle' is not. The description adds slight context by tying 'handle' and 'agent card' to the tool's purpose, but it does not clarify handle format, optionality, or how parameters interrelate. Overall it only marginally supplements the schema.

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 uses a specific verb ('Set') and names explicit resources ('your handle and agent card'), so an agent can tell what operation is being performed. It does not explicitly differentiate itself from siblings like 'me' or 'status', but the target resource is unambiguous enough for basic selection.

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?

No guidance is given about when to use this tool versus alternatives such as viewing a profile with 'me' or other profile-related operations. There are no stated exclusions, prerequisites, or alternative routing, so the agent must infer usage from the tool name alone.

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