List all building sites the current API key has access to. Each site represents a physical location (building, campus, warehouse) managed in Tacit. Sites are the top-level container. You need a site ID to query buildings, equipment, points, zones, and systems. Returns: Array of sites with id, nam...
AI agents call tacit_list_sites to retrieve information from Tacit MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about available building sites without creating, modifying, deleting, or executing any operations. It is a straightforward read operation that queries a list of accessible resources. The severity is low because it returns only organizational/structural information about sites without exposing sensitive operational data or enabling any state changes.
From the tool's definition Tool description states it 'List all building sites' and 'Returns: Array of sites with id, name, address, city, country, timezone.' The operation is a retrieval/query with no modification of data or side effects.
Attacks that exploit this kind of access
List all building sites the current API key has access to. Each site represents a physical location (building, campus, warehouse) managed in Tacit. Sites are the top-level container. You need a site ID to query buildings, equipment, points, zones, and systems. Returns: Array of sites with id, name, address, city, country, timezone. Use this tool first to discover available sites before querying building data. It is categorised as a Read tool in the Tacit MCP MCP Server, which means it retrieves data without modifying state.
Register the Tacit MCP server in PolicyLayer and add a rule for tacit_list_sites: 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 Tacit MCP. Nothing to install.
tacit_list_sites 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 tacit_list_sites 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 tacit_list_sites. 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.
tacit_list_sites is provided by the Tacit MCP server (ucl-sbde/tacit-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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