Show how a change has evolved over time in a Jujutsu (jj) repository. Lists previous commits which a change has pointed to as it was updated, rebased, etc. Parameters: revision (Revision to show evolution for), repoPath (Optional path to repo root or working directory), cwd (Optional working dire...
AI agents call evolog to retrieve information from Jj without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and displays historical evolution data for a revision in a Jujutsu repository. It has no side effects, does not modify any data, and is purely informational/query-based.
From the tool's definition Show how a change has evolved over time... Lists previous commits which a change has pointed to
Risk signalsAdmin/system-level operation
Attacks that exploit this kind of access
Show how a change has evolved over time in a Jujutsu (jj) repository. Lists previous commits which a change has pointed to as it was updated, rebased, etc. Parameters: revision (Revision to show evolution for), repoPath (Optional path to repo root or working directory), cwd (Optional working directory to run the command in), limit (Optional limit on number of revisions to show), patch (Optional flag to show patch compared to previous version). It is categorised as a Read tool in the Jj MCP Server, which means it retrieves data without modifying state.
Register the Jj MCP server in PolicyLayer and add a rule for evolog: 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 Jj. Nothing to install.
evolog 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 evolog 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 evolog. 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.
evolog is provided by the Jj MCP server (jj-mcp-server). 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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