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

Beyond the annotations (readOnly=false, idempotent=true, destructive=true), the description discloses that only changed settings need to be sent (merge semantics), that every current value is returned, and that defaults never authorize a paid generation. It never clarifies what the destructiveHint actually destroys, which is the main remaining gap.

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 tight sentences with the mutation action front-loaded, then the merge instruction, then the cost caveat. No filler or redundancy.

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 mutation tool with a nested partial-update schema and annotations, the description covers the action, the send-only-changed pattern, return behavior, and the critical 'no paid generation' caveat. An output schema exists, so return values need not be detailed; only the destructive semantics remain thin.

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 description coverage is effectively 0% for the top-level 'set' object, and the description names the three nested fields (aspect ratio, camera, resolution), which is useful. However it omits the valid-value source (the enums in uwear_settings_read) that only appears in the schema, so it adds only modest meaning over the structure.

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?

States a specific verb+resource (save photoshoot defaults) and enumerates the affected fields (aspect ratio, camera, resolution), which is enough to distinguish it from the read sibling uwear_settings_read. It does not name that sibling explicitly, so it stops short of full sibling differentiation.

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?

'Send only the settings that changed' gives a concrete partial-update usage pattern rather than leaving the caller to infer it. It does not spell out when to prefer this over reading settings first, but the intent is clear.

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