Skip to main content
Glama
Sign In
o3de-mcp

o3de-mcp

by nickschuetz
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

set_cvar

Set an O3DE console variable (CVAR) to a specified value for direct runtime configuration and debugging.

Instructions

Set the value of an O3DE console variable (CVAR).

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": {
      "name": "<name>",
      "value": "<value>"
    },
    "name": "set_cvar"
  }
}

Input Schema

NameRequiredDescriptionDefault
nameYes
valueYes

Output Schema

NameRequiredDescriptionDefault
resultYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.3.0

TDQS

B3.4/5.0
Behavior2/5

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

No annotations are present, so the description bears the full burden of behavioral disclosure. It only conveys that the tool mutates a CVAR; it does not mention side effects, persistence, type coercion, whether the CVAR must already exist, or error behavior.

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, front-loaded sentence with no filler. Every word contributes to stating the core operation clearly and efficiently.

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 simple with two required parameters and an output schema, so the description is minimally adequate. However, with no annotations, the agent still lacks guidance on runtime impacts, value validation, and when to prefer this over run_console_command.

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 adds no parameter-specific meaning beyond what the schema field names already imply. It does not clarify that value is a string representation, what formats are valid, or whether name refers to an existing registered CVAR.

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 and resource: 'Set the value of an O3DE console variable (CVAR).' It clearly identifies the exact operation and distinguishes this tool from its read counterpart, get_cvar.

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?

No explicit when-to-use or when-not-to-use guidance is provided, and no alternatives such as run_console_command or get_cvar are mentioned. The intended use is only implied by the verb 'Set', leaving the agent to infer the appropriate context.

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

Deploy Server

Other Tools