Schema | gitlab-duo-mcp-bridge

gitlab-duo-mcp-bridge

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Server Configuration

Describes the environment variables required to run the server.

Name	Required	Description	Default
`DUO_MOCK`	No	1/true → return a canned review (no Duo).
`DUO_CLI_CWD`	No	Working directory Duo runs in.
`GITLAB_TOKEN`	No	GitLab token passed through to Duo subprocess.
`DUO_TOOL_NAME`	No	Tool name registered with MCP.	duo_review
`DUO_TIMEOUT_MS`	No	Per-run timeout (ms).	120000
`DUO_CLI_COMMAND`	No	Executable to launch.	glab
`GITLAB_BASE_URL`	No	GitLab base URL passed through to Duo subprocess.
`GITLAB_DUO_MODEL`	No	Default model (e.g. gpt_5_codex).
`DUO_CLI_BASE_ARGS`	No	Sub-command args (space separated).	duo cli run
`DUO_CLI_GOAL_FLAG`	No	Flag that carries the prompt.	--goal
`DUO_CLI_EXTRA_ARGS`	No	Extra args appended to every call.
`DUO_CLI_MODEL_FLAG`	No	Flag that carries the model.	--model
`DUO_MAX_OUTPUT_CHARS`	No	Max raw output kept in raw.	100000
`DUO_MAX_INLINE_GOAL_CHARS`	No	Above this prompt size, the goal (big diffs) is sent via a temp file instead of inline.	7000

Instructions

Guidance the server publishes about itself, which clients place ahead of the tool catalog so the model reads it before choosing anything.

This server publishes no instructions, or was last inspected before Glama recorded them.

Capabilities

Features and capabilities supported by this server

Protocol revision2025-11-25

Capability	Details
`tools`	{ "listChanged": true }

Tools

Functions exposed to the LLM to take actions

Name Description

Name	Description
duo_reviewA	Run a code review with the GitLab Duo CLI and return a normalized, fault-tolerant result. Use this to get a 'second opinion' review of a diff or set of files: pass a unified `diff` (and/or `files`/`instructions`), and you get back a stable JSON structure with a `summary` and a list of `issues` (type, severity, file, line, message, suggestion). If Duo answers with prose instead of JSON, the result is still returned with `degraded: true` and the raw text in `summary`/`raw`. Your agent can then act on the issues (e.g. write fixes).

duo_reviewA

Run a code review with the GitLab Duo CLI and return a normalized, fault-tolerant result. Use this to get a 'second opinion' review of a diff or set of files: pass a unified diff (and/or files/instructions), and you get back a stable JSON structure with a summary and a list of issues (type, severity, file, line, message, suggestion). If Duo answers with prose instead of JSON, the result is still returned with degraded: true and the raw text in summary/raw. Your agent can then act on the issues (e.g. write fixes).

Prompts

Interactive templates invoked by user choice

Name	Description
No prompts

Resources

Contextual data attached and managed by the client

Name	Description
No resources

Server Configuration
Instructions
Capabilities
Tools
Prompts
Resources

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