AI agents call nol_card_guide to retrieve information from MCP-Dubai without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Given the empty description and the server's stated purpose of providing public data and curated knowledge, this tool most likely retrieves or displays guidance about Nol cards (a read-only informational operation). The lack of description reduces confidence, but the naming convention and server context suggest no destructive, financial, or execute-class capabilities.
From the tool's definition Tool name 'nol_card_guide' suggests retrieval of information about Nol cards (Dubai's public transport card system). The server context indicates provision of 'public data' and 'curated knowledge'. No description provided to confirm mutability or side effects.
Attacks that exploit this kind of access
nol_card_guide. It is categorised as a Read tool in the MCP-Dubai MCP Server, which means it retrieves data without modifying state.
Register the MCP-Dubai MCP server in PolicyLayer and add a rule for nol_card_guide: 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 MCP-Dubai. Nothing to install.
nol_card_guide 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 nol_card_guide 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 nol_card_guide. 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.
nol_card_guide is provided by the MCP-Dubai MCP server (mahdi-salmanzade/mcp-dubai). 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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