list_all_user_sessions

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

With no annotations provided, the description carries the full burden of behavioral disclosure but provides almost none. It doesn't indicate whether this is a read-only operation, what permissions might be required, whether it's resource-intensive, what format the output takes, or any behavioral characteristics. The description is essentially just a restatement of the tool name with confusing bracketed text.

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?

While technically concise (one short phrase), this is a case of under-specification rather than effective conciseness. The description doesn't contain enough meaningful information to be helpful. The bracketed text '[Required: sessions]' adds confusion rather than clarity. A truly concise description would efficiently convey essential information, but this omits too much.

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 1 undocumented parameter, no annotations, no output schema, and numerous sibling alternatives, the description is completely inadequate. It provides minimal information about what the tool does and no information about how to use it, what it returns, or when to choose it over alternatives. The agent would struggle to correctly select or invoke this tool based on this description alone.

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 input schema has 1 parameter ('domain') with 0% schema description coverage, meaning the parameter is completely undocumented in the schema. The description provides no information about this parameter - it doesn't mention 'domain' at all, nor does it explain what the bracketed '[Required: sessions]' means in relation to the actual parameter. The description fails to compensate for the complete lack of parameter documentation in 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 'List all user session(s) [Required: sessions]' is tautological - it essentially restates the tool name 'list_all_user_sessions' with minimal additional information. While it does specify the resource ('user session(s)'), it doesn't provide any meaningful context about what constitutes a 'user session' or the scope of the listing. The bracketed text '[Required: sessions]' is confusing and doesn't clarify the purpose.

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 zero guidance on when to use this tool versus alternatives. Given the numerous sibling tools (over 100) including several session-related tools like 'computers_with_most_sessions', 'users_with_most_sessions', and 'route_all_sessions_to_computers', the agent has no indication of when this specific 'list_all_user_sessions' tool is appropriate versus those alternatives. No context, prerequisites, or exclusions are mentioned.

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