unreal-mcp-additional-tools
An MCP server that complements Epic's official Unreal Engine MCP server with 78 additional tools across 14 subsystems for build/cook/package, cinematics, Niagara, automation testing, source control, profiling, World Partition, and project maintenance, using Unreal's built-in Python and Remote Control plugins.
Caution. Specific findings reduced this grade. They are listed on the page. Grades reflect the full trust pyramid: code, verification depth, and reputation. New projects cap at C until adoption is earned.
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nodormu
Source: Glama
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Install from
The grade above is for the source repository. Registries can serve a different version, so we mark the ones we were not able to read.
Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
When Vitest UI server is listening, arbitrary file can be read and executed
ws: Memory exhaustion DoS from tiny fragments and data chunks
ws: Uninitialized memory disclosure
UNREAL_MCP_CONFIGURATIONBuild configurationUNREAL_MCP_ENGINE_PATHUE engine install pathUNREAL_MCP_MODULES81 tools across 14 modules. Module names below are the values accepted by enabledModules / .UNREAL_MCP_MULTICAST_BINDBind address for the UDP multicast discovery socket. Advanced/rarely needed — see the security note below before narrowing this.UNREAL_MCP_MULTICAST_IFACEUNREAL_MCP_PLATFORMTarget platformUNREAL_MCP_PROJECT_PATHPath to .uproject file or project directoryUNREAL_MCP_PYTHON_PORTPython Remote Execution portUNREAL_MCP_RC_PORTRemote Control API portcomspecTool annotations
11/81 tools have annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
81/81 tools missing one or more hints — duplicate_actors (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); set_actor_tags (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); create_anim_blueprint (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +78 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Tool inputs are validated
77/81 tool handlers declare input schemas (95%)
Declare an inputSchema with zod/joi/yup on every tool definition.
Tool test coverage
Only 1/81 tools referenced in tests (1%)
Write tests that reference each tool by name so every tool has at least one test.
Production dependencies are patched
0 critical, 1 high severity in production deps — ws@8.19.0 (high), ws@8.19.0 (low)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
Dev dependencies
1 critical/high in dev-only deps (does not ship to users)
Upgrade dev dependencies when convenient.
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