wcs_add_layer

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

With no annotations, the description must fully disclose behavioral traits. It indicates a mutation (adding a layer) but does not mention permissions, idempotency, error conditions, or what the output (response) contains. The existence of an output schema is not referenced, leaving the agent under-informed.

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 extremely concise: two sentences that front-load the purpose and immediately follow with parameter clarification. No filler or redundant 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?

Given no annotations, 6 parameters, and an output schema, the description provides only minimal context. It explains how to find the identifier but omits important details like return value, error handling, and behavior on duplicate names. It is adequate but not comprehensive.

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?

Only two of six parameters (url and identifier) are explained in the description. The schema has 0% description coverage, so the description fails to clarify the meaning or default behavior of crs, format, version, and layer_name, which are left ambiguous.

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 adds a WCS coverage as a raster layer, with a specific example (DEM/elevation raster). It distinguishes itself from sibling tools like wms_add_layer, wmts_add_layer, etc., by specifying 'WCS coverage'.

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 explains the purpose of the two required parameters (url and identifier) and directs the user to ows_list_capabilities to find valid coverage IDs. However, it does not explicitly state when to use this tool versus alternatives or provide any exclusion criteria.

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