Run a capability defined in a POML file

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

Annotations provide readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description need not restate those. The description adds that the file specifies instructions and output formats, which is useful context. However, it does not disclose potential side effects like logging or resource usage, but the annotations cover the safety profile adequately.

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 three sentences, all earning their place: purpose, discovery path, and context customization. No fluff, properly front-loaded with the key action.

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?

Given the tool is high-level with an output schema and clear annotations, the description covers the essential aspects: what it does, how to find capabilities, and the optional context. It lacks details on error handling or output specifics, but the output schema likely provides that, making it complete enough.

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 coverage is 0%, so the description must compensate. It mentions 'Optional context values can be injected to customize its behavior,' which aligns with `poml_context`, and implies `poml_path` is the location. This is a minimal addition and does not clarify the structure of `poml_context` or expected file paths.

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 tool runs a predefined capability from a `.poml` file, distinguishing it from other tools like `list_agent_capabilities` and `run_pipeline`. It explains the file's role and the optional context injection, making the purpose specific and actionable.

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?

It explicitly instructs to discover capabilities with `list_agent_capabilities`, which provides clear when-to-use guidance. However, it does not specify when not to use this tool or mention alternatives like `run_pipeline`, leaving some room for ambiguity in choice of tool.

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