Validate and look up a phone number. Returns validity, formatted number, line type (mobile/landline/voip), carrier info, and location. Uses Twilio Lookup API.
Part of the Mcp Enrichment MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call verify_phone to retrieve information from Mcp Enrichment without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though verify_phone only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
tools:
verify_phone:
rules:
- action: allowSee the full Mcp Enrichment policy for all 6 tools.
Agents calling read-class tools like verify_phone have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.
Validate and look up a phone number. Returns validity, formatted number, line type (mobile/landline/voip), carrier info, and location. Uses Twilio Lookup API.. It is categorised as a Read tool in the Mcp Enrichment MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for verify_phone. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Mcp Enrichment MCP server.
verify_phone 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 verify_phone rule in your Intercept 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 Intercept policy for verify_phone. 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.
verify_phone is provided by the Mcp Enrichment MCP server (@intelagent/mcp-enrichment). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept