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arcgis-mcp-bridge

list_layers_in_map

Retrieve all layers in an ArcGIS Pro map, including visibility, group membership, and data source. Specify the project path and optionally the map name.

Instructions

List layers of one map with visibility, group flag and data source.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
paramsYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior3/5

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

No annotations are provided, so the description must convey behavioral traits. It mentions what information is returned but does not disclose whether the operation is read-only, safe, or has side effects. Output schema exists to clarify return structure, but safety profile is missing.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single sentence of 12 words, highly concise and front-loaded with the core action and returned attributes. No redundant information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present, the description need not detail return values. It covers the main action and key returned fields but omits the optional nature and default behavior of the 'map_name' parameter, which could be helpful for complete context.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0% as the tool description does not mention any parameters. Although the input schema provides descriptions for both parameters, the description adds no additional meaning beyond what the schema offers, failing to compensate for low coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'list' and the resource 'layers of one map', and specifies the returned information: visibility, group flag, and data source. It distinguishes from sibling 'list_layers' by requiring a specific map context.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit guidance on when to use this tool versus siblings like 'list_layers' or 'list_maps'. The description does not mention alternatives or exclusions, leaving the agent to infer usage.

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

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