gisgp

extract_domains

Extract coded value domains from an ArcGIS FeatureServer layer.

Returns JSON: {"layer_name": ..., "domains": {field: {name, field_alias, codes}}}.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "service_url": "<service_url>"
    },
    "name": "extract_domains"
  }
}

Input Schema

Name	Required	Description	Default
`token`	No
`service_url`	Yes

Output Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedJul 11, 2026

TDQS

B3.1/5.0

Behavior2/5

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

With no annotations, the description bears the full burden of behavioral disclosure. It describes the return format but omits important traits such as authentication requirements (the token parameter's role is unclear), error handling, or rate limits. The tool's behavior under failure conditions is not addressed.

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

Conciseness4/5

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

The description is concise, with two sentences that front-load the purpose. However, it could include additional crucial information (like parameter details) without becoming overly verbose, so slightly more structure would improve completeness.

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?

The tool is low-complexity, and the description covers the return format partially. However, given the lack of annotations and parameter descriptions, the description is not fully complete. An agent would need additional context to use it effectively, especially regarding the token and service_url.

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%, and the description does not explain the parameters. The token parameter's purpose and requiredness are not clarified; the service_url format is implied but not specified. The return structure is described, but this does not add meaning to the parameters themselves.

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 tool extracts coded value domains from an ArcGIS FeatureServer layer, which is a specific verb and resource. The purpose is unambiguous and distinct from sibling tools, which focus on geometry, analysis, or other GIS operations.

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?

The description does not provide any guidance on when to use this tool versus alternatives, nor does it mention prerequisites or limitations. It only states what the tool does without context for appropriate 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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