ipt_set_coverage

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

The description discloses a write side effect ('writes to the IPT') and partial-update semantics ('only the ones given'), which is useful because no annotations are provided. It does not cover permissions, reversibility, or what happens to existing values within a replaced coverage type beyond the word 'Replace'.

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 a single sentence with no wasted words. It front-loads the side effect, action, target, and scoping qualifier without repeating schema 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 mutating, four-parameter tool with no annotations and no output schema, this one-sentence description leaves significant operational context undocumented, such as how to clear a coverage category, required authorization, and expected response behavior. The partial-replacement hint helps, but the definition is still incomplete for safe use.

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 a meaningful semantic: only supplied coverage categories are replaced, so omitted categories can remain unchanged. However, schema description coverage is only 25%, and the description does little to explain the meaning of nested parameters such as bounding-box coordinates or taxon structures.

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 names a concrete action ('Replace') and a specific resource ('geographic, taxonomic and/or temporal coverage'), making the tool's scope immediately clear. It distinguishes this tool from the many sibling metadata, mapping, and EML tools without repeating the tool name.

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 phrase 'Replace geographic, taxonomic and/or temporal coverage' implies this tool is for updating coverage, which provides some context. However, it does not explicitly state when to prefer it over sibling set_* tools or when not to use it.

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