AI agents call history to retrieve information from Selvedge without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves historical change data captured by log_change without modifying or deleting it. No evidence suggests it executes code, creates side effects, or performs irreversible actions. Confidence is moderately high despite empty description because the function name and server's documented query interface clearly position it as a read operation.
From the tool's definition Tool name 'history' and server context indicate retrieval of past change events. The server description lists 'history' alongside 'diff', 'blame', and 'search' as query operations.
Documented attack patterns abuse exactly the kind of access history gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Selvedge, and nothing reaches the server without passing your rules. This is the rule we recommend for history:
{
"version": "1",
"default": "deny",
"tools": {
"history": {}
}
}history is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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history. It is categorised as a Read tool in the Selvedge MCP Server, which means it retrieves data without modifying state.
Register the Selvedge MCP server in PolicyLayer and add a rule for history: 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 Selvedge. Nothing to install.
history 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 history 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 history. 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.
history is provided by the Selvedge MCP server (masondelan/selvedge). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Selvedge, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 Selvedge tools catalogued and risk-classified — across an index of 43,000+ MCP servers.