AI agents call clear-session to permanently remove resources in CodeAnalysis MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Although the description is empty (lowering confidence slightly), the tool name itself strongly suggests destruction of stored session data. This is irreversible—once a session is cleared, its analysis state and history cannot be recovered. The presence of 'create-session' as a sibling confirms sessions are persistent entities.
From the tool's definition Tool name is 'clear-session' with empty description. The verb 'clear' combined with 'session' indicates removal or destruction of session data.
Documented attack patterns abuse exactly the kind of access clear-session gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and CodeAnalysis MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for clear-session:
{
"version": "1",
"default": "deny",
"hide": [
"clear-session"
]
}clear-session disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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clear-session. It is categorised as a Destructive tool in the CodeAnalysis MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the CodeAnalysis MCP Server MCP server in PolicyLayer and add a rule for clear-session: 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 CodeAnalysis MCP Server. Nothing to install.
clear-session is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the clear-session 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 clear-session. 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.
clear-session is provided by the CodeAnalysis MCP Server MCP server (0xjcf/mcp_codeanalysis). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from CodeAnalysis MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
31 CodeAnalysis MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.