upload-my-profile-photo

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

Annotations indicate non-read-only and non-destructive with open world hint. The description adds transparency about the base64 encoding, size limit (4 MB), JPEG format, and that Microsoft 365 generates multiple downsized variants. This goes beyond annotations to disclose side effects and constraints, with no contradictions.

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 slightly lengthy but front-loaded with the purpose. It includes a tip and multiple details that are useful. Every sentence adds value, though it could be more concise. Still well-structured.

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?

Given the tool's complexity (upload with format/size constraints, side effects like variant generation), the description adequately covers what to provide, the process, and even a permission tip. No output schema exists, but the response behavior is described via parameters. It is sufficiently complete for an agent to use correctly.

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% with descriptions for each parameter. The description adds meaning beyond the schema by explaining the base64 encoding and that the server decodes before PUT, and clarifies the response control options (includeHeaders, excludeResponse). This adds value.

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 clearly states the action of uploading or updating a profile photo. However, there is a slight inconsistency: the first sentence mentions updating for specified contact/group/team/user, but the tip clarifies it's for the signed-in user, which matches the input schema (no target parameter). Overall, the verb and resource are clear.

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?

The description provides a hint about using download-bytes to retrieve the current photo, which is complementary. However, it lacks explicit guidance on when to use this tool versus sibling tools like upload-file-content. No when-not-to-use or alternatives are mentioned.

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