AI agents call getPullRequestDiffStat to retrieve information from Bitbucket MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries pull request diff statistics (file changes, line additions/deletions, etc.). It performs no side effects, creates no data, executes no code, and makes no destructive or financial operations. It is a straightforward Read operation with minimal risk if misused—an AI agent could only retrieve unnecessary statistics, not harm any resources.
From the tool's definition Tool name 'getPullRequestDiffStat' and description 'Get diff statistics for a pull request' indicate retrieval of statistics without modification. The verb 'Get' and the read-only nature of diff statistics confirm this is a query operation.
Documented attack patterns abuse exactly the kind of access getPullRequestDiffStat gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Bitbucket MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for getPullRequestDiffStat:
{
"version": "1",
"default": "deny",
"tools": {
"getPullRequestDiffStat": {}
}
}getPullRequestDiffStat is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get diff statistics for a pull request. It is categorised as a Read tool in the Bitbucket MCP MCP Server, which means it retrieves data without modifying state.
Register the Bitbucket MCP server in PolicyLayer and add a rule for getPullRequestDiffStat: 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 MCP. Nothing to install.
getPullRequestDiffStat 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 getPullRequestDiffStat 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 getPullRequestDiffStat. 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.
getPullRequestDiffStat is provided by the Bitbucket MCP server (matanyemini/bitbucket-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Bitbucket MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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49 Bitbucket MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.