services_camera_snapshot

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

With no annotations, the description partially compensates by noting the filename path constraint and directory allow-listing requirement. However, it does not disclose side effects (e.g., file overwrite behavior), permissions needed, or output format.

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 concise with two focused sentences. It is front-loaded with the core purpose, then adds key detail about the filename. No extraneous information.

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 two-parameter tool, the description covers the filename constraint but omits the return value (though output schema exists), entity_id expected values, and typical usage patterns. It is minimally complete.

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 description adds meaning for the 'filename' parameter (path inside HA config dir, directory must exist and be allow-listed) but offers nothing for 'entity_id'. Since schema description coverage is 0%, the description should document both parameters.

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 action ('Take a still snapshot from a camera entity') and defines the primary resource. However, it does not distinguish this from the sibling tool 'services_camera_record', which is a closely related alternative.

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 (e.g., 'services_camera_record'). The description mentions directory requirements but lacks explicit usage context or preconditions beyond those.

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