Update Layer Cim

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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds only a generic "returns verifiable structured results" (redundant given the output schema) and a vague note that write/path restrictions depend on service capability. It adds some flavor but no concrete behavioral detail such as what gets mutated or what fails.

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?

It is short and front-loads the action, which is good, but the brevity comes from omission rather than economy — the second sentence is generic boilerplate that adds little. Not padded, but under-specified for a 5-parameter mutation.

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 five undocumented required parameters, an output schema, and no annotation-based behavioral guidance beyond the safety flags, the description is far too thin. It never explains what CIM editing is or what the value/cim_path contract is, leaving the agent unable to construct a correct call.

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?

All five parameters are required strings with 0% schema description coverage, so the description must carry the burden — and it says nothing about aprx_path, map_name, layer_name, or especially cim_path and value. An agent has no way to know what a CIM path or value should be. This is a total failure to compensate for the coverage gap.

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 gives a bare verb+resource ("更新图层" / update layer), which correctly identifies a mutation but drops the defining term of the tool: CIM (Cartographic Information Model). It reads as a loose paraphrase of the title "Update Layer Cim" and gives no way to distinguish it from the many other layer-mutation siblings such as set_definition_query or layer_properties.

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?

There is no statement of when to use this tool, what precondition must hold (a project/map/layer loaded, a valid CIM path), or what alternative to prefer. The closing clause about write/path restrictions is a caveat, not usage guidance.

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