dataverse_whoami

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

Adds context beyond annotations (readOnlyHint, idempotentHint) by specifying the returned fields (UserId, BusinessUnitId, OrganizationId) and the purpose (authentication confirmation). 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?

Two concise sentences that front-load the purpose and include usage guidance. No redundant 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 simple identity check tool with one parameter and an output schema, the description provides all necessary information: what it does, when to use it, and what it returns. Complete.

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?

The only parameter (dataverse_url) is already well-described in the input schema. The tool description adds no additional meaning, but schema coverage is adequate, so baseline of 3 is appropriate.

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 'Return the authenticated caller's identity' using a specific verb and resource, and distinguishes itself from siblings like dataverse_get_user by focusing on the current session's identity.

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?

Explicitly recommends calling 'at session start to confirm authentication' and for privilege checks, providing clear context. Does not mention when not to use or alternatives, but the usage is well-defined.

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