vcs_branch_create
Create a new branch, optionally starting from a given ref (default HEAD), and optionally switch to it. Reversible (git branch -d), so not gated. Errors clearly if the branch already exists.
This record as markdown: /tools/breakpoint-mcp/vcs-branch-create.md
What vcs_branch_create does on Breakpoint
AI agents use vcs_branch_create to create or update resources in Breakpoint, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Breakpoint environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
from | string | — | Start point (branch, tag, or sha; default HEAD) |
name | string | Yes | New branch name |
switch | boolean | — | Switch to the new branch after creating it (default false) |
Parameters from the server's own tool schema.
Why vcs_branch_create is rated Medium
Creating a branch is a Write operation as it creates new data structures in version control that can be undone. While reversible, an agent misusing this could create many branches cluttering the repository or switch branches inappropriately, affecting development workflows. Not Destructive since deletion is straightforward; not Execute since it doesn't run arbitrary code.
From the tool's definition Tool description explicitly states it creates a new branch and can switch to it. The operation is described as 'reversible' via `git branch -d`, confirming it modifies repository state without permanent loss.
Attacks that exploit this kind of access
The rule that runs vcs_branch_create safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Breakpoint, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For vcs_branch_create, this is the rule to start with:
vcs_branch_create stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Breakpoint, apply this rule, and every vcs_branch_create call is checked against it from then on.
Questions about vcs_branch_create
Create a new branch, optionally starting from a given ref (default HEAD), and optionally switch to it. Reversible (git branch -d), so not gated. Errors clearly if the branch already exists. It is categorised as a Write tool in the Breakpoint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
vcs_branch_create accepts 3 parameters: from, name, switch. Required: name. The full parameter table on this page comes from the server's own tool schema.
Register the Breakpoint MCP server in PolicyLayer and add a rule for vcs_branch_create: 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 Breakpoint. Nothing to install.
vcs_branch_create is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the vcs_branch_create 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 vcs_branch_create. 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.
vcs_branch_create is provided by the Breakpoint MCP server (breakpoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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