merge
Merges a branch into the current branch. Supports abort, continue, and quit actions. Returns structured data with merge status, fast-forward detection, conflicts, and commit hash.
This record as markdown: /tools/io-github-dave-london-cargo/merge.md
What merge does on Cargo
AI agents invoke merge to trigger actions in Cargo. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why merge is rated High
A git merge operation modifies the repository's commit history and working tree by integrating changes from another branch. While it can be aborted, the merge itself is a significant operation that triggers external git processes and can create new commits, alter history, and introduce conflicts.
From the tool's definition Merges a branch into the current branch. Supports abort, continue, and quit actions. Returns structured data with merge status, fast-forward detection, conflicts, and commit hash.
Attacks that exploit this kind of access
The rule that runs merge safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Cargo, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For merge, this is the rule to start with:
merge stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Cargo, apply this rule, and every merge call is checked against it from then on.
Questions about merge
Merges a branch into the current branch. Supports abort, continue, and quit actions. Returns structured data with merge status, fast-forward detection, conflicts, and commit hash. It is categorised as a Execute tool in the Cargo MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Cargo MCP server in PolicyLayer and add a rule for merge: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Cargo. Nothing to install.
merge is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the merge rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for merge. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
merge is provided by the Cargo MCP server (Dave-London/Pare). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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