users_with_most_cross_domain_sessions

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

With no annotations provided, the description carries full burden but offers almost no behavioral disclosure. It doesn't indicate whether this is a read-only operation, what data format it returns, whether it's resource-intensive, or any side effects. The WIP tag suggests incomplete information, further reducing transparency.

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 brief but poorly structured with a WIP tag and bracketed note that don't follow standard description conventions. It's under-specified rather than concise, and the information isn't front-loaded effectively for agent comprehension.

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 tool with no annotations, 0% schema description coverage, and no output schema, the description is completely inadequate. It doesn't explain what the tool returns, how results are formatted, what 'most' means quantitatively, or provide enough context for an agent to use it effectively alongside the many similar sibling tools.

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% with 1 parameter, so the description must compensate but fails to do so. It doesn't mention the 'domain' parameter at all, nor explain what the parameter represents or how it affects the results. The bracketed note mentions 'sessions' but doesn't connect it to the actual parameter.

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 partially states what the tool does ('Users with most cross-domain sessions') but is vague and includes a WIP tag and bracketed note that adds confusion rather than clarity. It doesn't specify the action verb clearly (is it listing? ranking? finding?) and doesn't distinguish from siblings like 'users_with_most_sessions' or 'list_all_cross_domain_user_sessions_and_memberships'.

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 bracketed note '[Required: sessions]' provides minimal usage context about prerequisites, but doesn't explain when to use this tool versus the many sibling tools for session analysis or user listing. No explicit guidance on alternatives, exclusions, or specific scenarios for this tool's application.

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