List all tags with usage counts.
AI agents call list_tags to retrieve information from Streamline MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs no side effects—it only retrieves metadata about tags that already exist. There is no creation, modification, deletion, or execution of external operations. The blast radius of misuse is minimal; an agent cannot cause harm by reading tag information. Confidence is high because the description is explicit and unambiguous.
From the tool's definition Tool name 'list_tags' and description 'List all tags with usage counts' indicate a query operation that retrieves and displays existing data without modification. The verb 'list' and action of counting usage are read-only operations.
Attacks that exploit this kind of access
List all tags with usage counts. It is categorised as a Read tool in the Streamline MCP MCP Server, which means it retrieves data without modifying state.
Register the Streamline MCP server in PolicyLayer and add a rule for list_tags: 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 Streamline MCP. Nothing to install.
list_tags 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_tags 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_tags. 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_tags is provided by the Streamline MCP server (rostehea/streamline-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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