AI agents use set_scope to create or update resources in Mitmproxy — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mitmproxy environment.
With no description available, I infer from the name 'set_scope' that it likely configures which traffic is in scope for interception/analysis. This is most likely a Write operation (modifying configuration/settings). Confidence is low due to empty description. In the context of mitmproxy, scoping controls what traffic is intercepted, which could have security implications but is reversible configuration.
From the tool's definition Tool name 'set_scope' with empty description; server context involves intercepting/modifying HTTP/HTTPS traffic
Documented attack patterns abuse exactly the kind of access set_scope gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Mitmproxy, and nothing reaches the server without passing your rules. This is the rule we recommend for set_scope:
{
"version": "1",
"default": "deny",
"tools": {
"set_scope": {
"limits": [
{
"counter": "set_scope_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_scope 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.
Free to start. No card required.
set_scope. It is categorised as a Write tool in the Mitmproxy MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Mitmproxy MCP server in PolicyLayer and add a rule for set_scope: 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 Mitmproxy. Nothing to install.
set_scope is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the set_scope 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 set_scope. 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.
set_scope is provided by the Mitmproxy MCP server (snapspecter/mitmproxy-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 25 Mitmproxy tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
25 Mitmproxy tools catalogued and risk-classified — across an index of 42,500+ MCP servers.