Get the diffstat (summary of changed files) of a pull request
AI agents call bb_get_pull_request_diffstat to retrieve information from Bitbucket Cloud MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries metadata about a pull request without creating, modifying, deleting, or executing operations. It is purely informational, retrieving already-computed statistics about file changes. The blast radius of misuse is minimal: an attacker could learn which files were modified in a PR, but cannot change code, trigger pipelines, or cause data loss.
From the tool's definition The tool name and description explicitly indicate it "Get[s] the diffstat (summary of changed files)" — a read-only retrieval operation with no side effects on the pull request or repository state.
Attacks that exploit this kind of access
Get the diffstat (summary of changed files) of a pull request. It is categorised as a Read tool in the Bitbucket Cloud MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Bitbucket Cloud MCP Server MCP server in PolicyLayer and add a rule for bb_get_pull_request_diffstat: 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 Cloud MCP Server. Nothing to install.
bb_get_pull_request_diffstat is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the bb_get_pull_request_diffstat 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 bb_get_pull_request_diffstat. 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.
bb_get_pull_request_diffstat is provided by the Bitbucket Cloud MCP Server MCP server (or2ooo/bitbucket-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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