Return all regex matches found in a string.
AI agents call regex_extract to retrieve information from Mdb Mcp Gateway without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves/extracts data from an input string using regex pattern matching. It does not create, modify, delete, or execute any external operations. The operation is deterministic and read-only, making it a Read category tool with low severity risk even if misused by an AI agent (worst case: incorrect extraction or performance issues on large inputs).
From the tool's definition Tool description states it 'Return[s] all regex matches found in a string' — a pure string-matching operation with no side effects, state changes, or external operations.
Attacks that exploit this kind of access
Return all regex matches found in a string. It is categorised as a Read tool in the Mdb Mcp Gateway MCP Server, which means it retrieves data without modifying state.
Register the Mdb Mcp Gateway MCP server in PolicyLayer and add a rule for regex_extract: 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 Mdb Mcp Gateway. Nothing to install.
regex_extract 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 regex_extract 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 regex_extract. 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.
regex_extract is provided by the Mdb Mcp Gateway MCP server (ranfysvalle02/m-gate). 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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