XGR MCP Gateway

Find reusable XRC-137 rules

find_reusable_xrc137_rules

Read-onlyIdempotent

Read-only metadata-assisted search for existing owner XRC-137 contracts that could be reused instead of redeployed.

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": {
      "owner": "<owner>"
    },
    "name": "find_reusable_xrc137_rules"
  }
}

Input Schema

Name	Required	Description
`limit`	No	Maximum number of records to return.
`owner`	Yes	EVM address of the XDaLa session owner or relevant account.
`ruleHash`	No	Value for the rule hash parameter.
`draftRule`	No	Value for the draft rule parameter.
`includeUsage`	No	Value for the include usage parameter.
`allowEncrypted`	No	Value for the allow encrypted parameter.
`requiredInputKeys`	No	Value for the required input keys parameter.
`requiredOutputKeys`	No	Value for the required output keys parameter.

Output Schema

Name	Required	Description	Default
`data`	Yes	Structured result data returned by the XGR MCP gateway.

Schema Changelog

Changes observed during successful MCP inspections.

First observedJun 13, 2026

TDQS

A3.9/5.0

Behavior3/5

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

Annotations already provide strong behavioral hints (readOnlyHint, openWorldHint, idempotentHint). The description adds 'metadata-assisted search' and 'reuse' context, reinforcing read-only behavior. No contradictions. The description complements the annotations adequately.

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, well-structured sentence that front-loads the key purpose. No unnecessary words or repetition. Every part contributes meaning.

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?

Given the complexity (8 parameters, nested object) and the presence of a similar sibling ('get_unused_xrc137_rules'), the description could be more specific about the relationship with that sibling and what 'metadata-assisted' entails. However, the output schema exists and annotations are rich, so the description is minimally adequate but not comprehensive.

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

Parameters3/5

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

Schema coverage is 100%, so the baseline is 3. The description uses 'metadata-assisted' to hint at filtering, but does not add significant meaning beyond the schema's parameter descriptions. It does not explain how parameters combine or prioritize them, so marginal value is added.

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 uses a specific verb ('find'), identifies the resource ('reusable XRC-137 rules'), and specifies the context ('existing owner XRC-137 contracts that could be reused instead of redeployed'). It clearly distinguishes from siblings like 'get_unused_xrc137_rules' by emphasizing search and reuse.

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

Usage Guidelines4/5

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

The description implies when to use this tool: to find existing rules and avoid redeployment. However, it does not explicitly state when not to use it or compare it to the closely related sibling 'get_unused_xrc137_rules'. The context is clear but lacks explicit exclusions.

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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