list_services

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

No annotations are present, so the description carries the full burden. It discloses the return fields (Name, DisplayName, Status) and the optional filter, but does not explicitly state that the operation is read-only, nor does it mention permission requirements or error conditions. The behavior is mostly clear from the verb 'List'.

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 two sentences, each informative and necessary: the first states the purpose and the second states return fields. No redundant or irrelevant text.

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 list tool with no output schema and no annotations, the description adequately covers purpose and return fields. It implies that omitting the filter lists all services, but it does not specify whether the filter applies to Name, DisplayName, or both. Overall, it is mostly complete but has minor ambiguity.

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 schema description for the filter parameter already provides complete details about the wildcard format (e.g., 'Sql*'). The tool description only says 'name pattern' and repeats what the schema says, adding no new meaning. Given 100% schema coverage, the baseline of 3 applies.

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 uses a specific verb 'List' with a clear resource 'Windows services' and mentions an optional filter. This distinguishes it from siblings like get_service (likely single-service) and control_service (state changes).

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 implies usage for enumerating services but does not explicitly mention alternatives or exclusions. It lacks comparisons to get_service or control_service, so guidance is only implied.

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