AI agents call filter_level to retrieve information from Log without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves log data based on severity level filtering. It performs analysis and retrieval only, with no capability to modify, delete, or execute operations. The filtered output is informational only, making it a Read category tool with low severity risk.
From the tool's definition Tool description states it 'Filter[s] log file by level' - a read-only operation that retrieves and filters existing log data without modifying, deleting, or executing anything. No side effects mentioned.
Attacks that exploit this kind of access
Filter log file by level: ERROR, WARN, INFO, DEBUG. Supports JSON and plain text logs. It is categorised as a Read tool in the Log MCP Server, which means it retrieves data without modifying state.
Register the Log MCP server in PolicyLayer and add a rule for filter_level: 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 Log. Nothing to install.
filter_level 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 filter_level 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 filter_level. 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.
filter_level is provided by the Log MCP server (sheikhbasit/log-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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