list_clients

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

Annotations already declare readOnlyHint=true, openWorldHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is clear. The description adds the endpoint but no additional behavioral context such as pagination, response shape, or authentication needs. This is adequate but not rich, consistent with a 3.

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 extremely concise—just 'Get Clients.' and the endpoint. This is appropriately sized for a simple no-parameter GET, with no wasted words. It lacks front-loading of anything beyond the verb and resource, but there's little else needed.

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 zero-parameter read-only tool with an output schema (even if not shown) and full annotations, the description is minimal but arguably sufficient to make the call. However, it doesn't clarify what 'clients' refers to or any optional behavior (e.g., filtering unavailable), and with so many sibling list_* tools, a bit more context would help an agent. Missing that pushes it to a 3.

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 tool has zero parameters, and the schema covers everything (100% coverage by virtue of empty properties). The description adds nothing about parameters, which is fine since there are none. Baseline for 0 params is 4, and there's no gap to compensate for.

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 verb 'Get' and the resource 'Clients', which is specific enough for a list operation. However, it doesn't differentiate from numerous sibling list_* tools (e.g., list_accounts, list_devices, list_servers), and 'Clients' could be ambiguous without context. Still, it avoids tautology and names a concrete resource.

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 provided on when to use this tool versus alternatives like list_accounts or list_devices. Given the large set of list_* siblings, an agent needs some distinction (e.g., scope, filtering, or use case), but the description only gives the HTTP endpoint, which doesn't help choose correctly.

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