list_active_watches
AI agents call list_active_watches to retrieve information from Trip Search without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to retrieve or enumerate active price watches that the user has previously set. No modification, deletion, execution, or financial transaction occurs—it only reads and returns data about existing watches. The low severity reflects the minimal risk from exposing read-only access to watch metadata.
From the tool's definition Tool name 'list_active_watches' indicates a retrieval operation that lists existing watches without modifying them.
Attacks that exploit this kind of access
list_active_watches. It is categorised as a Read tool in the Trip Search MCP Server, which means it retrieves data without modifying state.
Register the Trip Search MCP server in PolicyLayer and add a rule for list_active_watches: 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 Trip Search. Nothing to install.
list_active_watches 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 list_active_watches 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 list_active_watches. 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.
list_active_watches is provided by the Trip Search MCP server (nanwer/trip-search-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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