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patchRpc

Update an existing JSON-RPC method's definition by modifying its SQL query, type hints, and output format.

Instructions

Update existing JSON-RPC method definitions.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
methodYesName of the method to create.
qYesSQL statement. Allowed: SELECT, INSERT, UPDATE, DELETE, MERGE.
type_hintsNoType hints for JSON-encoded parameters that are not JSON in the database.
type_formatsNoFormatting rules for typed parameters, e.g. date formats.
output_formatNoOutput format for the result.json
srsNoEPSG code for the spatial reference system used for geometry output.
Behavior2/5

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

No annotations are provided, so the description must disclose behavioral traits. It only states 'update' but does not mention side effects, required permissions, partial vs full updates, or error conditions.

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?

A single, clear sentence that is front-loaded. It could be more detailed but remains appropriately concise.

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

Completeness2/5

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

Lacks output schema, no return value description, and does not explain behavior when optional parameters are omitted. For a 6-parameter tool with nested objects, more context is needed.

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% with individual parameter descriptions. The description adds minimal value beyond the schema, only implying the 'method' and 'q' are required for an existing method.

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?

Description explicitly states verb 'update' and resource 'existing JSON-RPC method definitions', clearly distinguishing from sibling tools like getRpc (read), postRpc (create), and deleteRpc (delete).

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

Usage Guidelines3/5

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

The description implies use for existing methods only ('existing'), but provides no explicit guidance on when to choose this over alternatives, nor any prerequisites or conditions.

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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