get_camera_frame

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

With no annotations, the description carries the full disclosure burden and handles it well: it reveals the JPEG return format, live capture nature, LAN networking requirement, Liveview prerequisite, IP auto-detection, and the stored-config auth mechanism. It does not cover failure behavior when prerequisites are unmet, but the core operational traits are transparent.

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?

Three dense sentences with the core action front-loaded, followed by compatibility constraints and auth/auto-detection behavior. Every sentence earns its place; there is no filler or redundant restating of schema fields.

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 zero required parameters, no annotations, and no output schema, the description covers the essentials: return type (JPEG image), prerequisites, and auth flow. Minor gaps remain — error behavior when the printer is unreachable or Liveview is disabled, and selection behavior when multiple printers exist without the printer param.

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 100%, giving a baseline of 3. The description adds meaningful context beyond the schema: that ip is normally auto-detected (making the param an override), and that access_code has a lifecycle — set once via set_camera_access for cloud printers — which the schema descriptions do not fully convey.

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 opens with a specific verb and resource — 'Capture a live JPEG snapshot from a printer's chamber camera over the LAN and return it as an image.' This inherently distinguishes it from camera-setting siblings (set_camera_access, set_recording, set_timelapse), file tools (download_file), and status tools (get_status). The model compatibility list (A1/A1 Mini/P1P/P1S) adds further precision.

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 gives concrete use conditions: supported printer models, same-network requirement, and 'LAN Mode Liveview' enabled. It also references the prerequisite auth flow via set_camera_access. It stops short of explicitly stating when-not-to-use it or naming alternative capture tools, so it earns a 4 rather than a 5.

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