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Rong-Ding

MarketCanvas-Env MCP Server

by Rong-Ding

get_action_schema

Read the validated schemas for add, move, update, delete, and submit actions to confirm required fields before executing canvas edits or submissions.

Instructions

Read the validated action schema for add, move, update, delete, and submit.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.5/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden. 'Read' conveys a read-only, side-effect-free operation and 'validated' implies the schema has been checked, which is useful context. However, it does not mention permissions, rate limits, or whether the schema is static or environment-dependent. Because an output schema exists, the return format need not be described here.

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?

A single sentence that is front-loaded with the verb and resource, with no wasted words. Appropriately sized for a zero-parameter getter.

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

Completeness4/5

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

The tool is a simple read with zero parameters and an existing output schema, so the description need not explain return values. It names the covered action types, which is sufficient operational scope. The only slight gap is that it does not relate itself to the sibling execute_action.

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

Parameters4/5

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

The tool takes zero parameters, so the baseline of 4 applies. The description does not need to add parameter meaning beyond the empty schema.

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

Purpose4/5

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

States a specific verb ('Read') and resource ('validated action schema') and enumerates the action types covered (add, move, update, delete, submit). It implicitly distinguishes itself from the sibling execute_action by being a schema read rather than an execution. The only gap is that sibling differentiation is not made explicit.

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 offers no guidance on when to use this tool versus execute_action or the other siblings, nor any prerequisites or conditions. It only states what is returned, leaving the agent to infer the use case.

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