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

Annotations only declare readOnlyHint=false and destructiveHint=false, so the description carries real weight by disclosing that the call consumes credits, that get_cost is free and renders nothing, and that loc_id changes persistence behavior. It does not say whether generation is synchronous or job-based, which would matter for a credit-spending generation tool.

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?

Two sentences, zero filler, front-loaded with the action and output format before the cost note and persistence guidance. Every clause carries actionable 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 5-parameter generation tool with full schema coverage, minimal annotations and no output schema, the description supplies the essential missing context: credit cost, the free price-check path, and loc_id persistence semantics. It omits only the async/job-return dimension, which an agent might need to retrieve the rendered result.

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%, so the baseline is 3, but the description adds meaning beyond the schema for loc_id (persisted panoramas are re-findable by the viewer; omitting it makes the result a throwaway) and reinforces the get_cost preview contract. mood, intent and camera_height are left entirely to the schema.

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 (Generate) plus a precisely characterized resource (360° equirectangular HDRI panorama of a place), and names the artifact format agents need to distinguish it from siblings like lab_generate_location_variants or lab_restyle_location.

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?

Gives clear conditional usage: pass loc_id to persist on a board, omit it for a one-off, and use get_cost:true to preview price before charging. It stops short of naming an alternative tool for related needs (e.g. variants or restyle), so no explicit exclusions or routing to siblings.

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