suggest_code_change · Bitbucket Server MCP: Risk & Policy

WHAT IT DOES

What suggest_code_change does on Bitbucket Server MCP

AI agents use suggest_code_change to create or update resources in Bitbucket Server MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Bitbucket Server MCP environment.

WHY IT NEEDS A POLICY

Why suggest_code_change needs a policy

This tool creates or modifies data (adds a suggestion comment to a pull request) in a reversible manner. While it doesn't delete data or execute arbitrary code, it does write new content to the repository system. The severity is medium because a misused suggestion could mislead code review or introduce unintended development direction, but the effect is not destructive and remains reversible through comment deletion.

From the tool's definition The tool 'suggest_code_change' performs an action that 'Add a code suggestion comment' — this creates new data (a comment) on a pull request, which is a write operation. The description explicitly indicates creation of content ('Add').

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

suggest_code_change Rate-limited

suggest_code_change 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "suggest_code_change": {
      "limits": [
        {
          "counter": "suggest_code_change_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Bitbucket Server MCP, so you can run agents against it safely.

FAQ

Questions about suggest_code_change

What does the suggest_code_change tool do? +

Add a code suggestion comment to a file in a pull request. It is categorised as a Write tool in the Bitbucket Server MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on suggest_code_change? +

Register the Bitbucket Server MCP server in PolicyLayer and add a rule for suggest_code_change: 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 Bitbucket Server MCP. Nothing to install.

What risk level is suggest_code_change? +

suggest_code_change is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit suggest_code_change? +

Yes. Add a rate_limit block to the suggest_code_change 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.

How do I block suggest_code_change completely? +

Set action: deny in the PolicyLayer policy for suggest_code_change. 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.

What MCP server provides suggest_code_change? +

suggest_code_change is provided by the Bitbucket Server MCP server (maniksi/bitbucket-server-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.