Use this tool to extract, test, or transform text using a regular expression. Triggers: 'extract all emails from this', 'find all URLs in this text', 'does this match a pattern?', 'replace all instances of X with Y', 'parse this log with regex'. Modes: 'matches' (all full matches), 'groups' (capt...
Part of the Toolora MCP Server server.
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AI agents invoke run_regex to trigger processes or run actions in Toolora MCP Server. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
run_regex can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"run_regex": {
"limits": [
{
"counter": "run_regex_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Toolora MCP Server policy for all 34 tools.
These attack patterns abuse exactly the kind of access run_regex gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Use this tool to extract, test, or transform text using a regular expression. Triggers: 'extract all emails from this', 'find all URLs in this text', 'does this match a pattern?', 'replace all instances of X with Y', 'parse this log with regex'. Modes: 'matches' (all full matches), 'groups' (capture groups from all matches), 'test' (true/false), 'replace' (substitute matches). Returns results with match positions.. It is categorised as a Execute tool in the Toolora MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Toolora MCP Server MCP server in PolicyLayer and add a rule for run_regex: 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 Toolora MCP Server. Nothing to install.
run_regex is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the run_regex 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 run_regex. 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.
run_regex is provided by the Toolora MCP Server MCP server (https://toolora.dev/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 34 Toolora MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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