List all active subscriptions in the Context Broker.
AI agents call orion_list_subscriptions to retrieve information from Fiware Orion without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool queries and retrieves information about existing subscriptions without creating, modifying, or deleting any data. It is a read-only operation analogous to listing or fetching, which poses minimal risk even if misused by an AI agent.
From the tool's definition Tool name 'orion_list_subscriptions' and description 'List all active subscriptions in the Context Broker' indicate a data retrieval operation with no side effects.
Attacks that exploit this kind of access
List all active subscriptions in the Context Broker. It is categorised as a Read tool in the Fiware Orion MCP Server, which means it retrieves data without modifying state.
Register the Fiware Orion MCP server in PolicyLayer and add a rule for orion_list_subscriptions: 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 Fiware Orion. Nothing to install.
orion_list_subscriptions 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 orion_list_subscriptions 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 orion_list_subscriptions. 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.
orion_list_subscriptions is provided by the Fiware Orion MCP server (k2iser/fiware-orion-mcp). 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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