List available OpenTabs tools with their descriptions and input schemas. Use this to discover what tools are available before calling them with opentabs_call.
AI agents call opentabs_list_tools to retrieve information from OpenTabs without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool purely enumerates and describes available capabilities without performing side effects. It is informational—similar to a help or documentation query. The act of listing tools carries minimal risk; the actual risk comes from calling those tools via opentabs_call. Confidence is high because the description explicitly states 'list' and 'discover', both read-only operations.
From the tool's definition Tool name 'opentabs_list_tools' and description 'List available OpenTabs tools with their descriptions and input schemas' indicate retrieval and discovery of metadata about available tools. No modification, deletion, or execution of external operations occurs.
Documented attack patterns abuse exactly the kind of access opentabs_list_tools gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and OpenTabs, and nothing reaches the server without passing your rules. This is the rule we recommend for opentabs_list_tools:
{
"version": "1",
"default": "deny",
"tools": {
"opentabs_list_tools": {}
}
}opentabs_list_tools is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
List available OpenTabs tools with their descriptions and input schemas. Use this to discover what tools are available before calling them with opentabs_call. It is categorised as a Read tool in the OpenTabs MCP Server, which means it retrieves data without modifying state.
Register the OpenTabs MCP server in PolicyLayer and add a rule for opentabs_list_tools: 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 OpenTabs. Nothing to install.
opentabs_list_tools 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 opentabs_list_tools 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 opentabs_list_tools. 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.
opentabs_list_tools is provided by the OpenTabs MCP server (opentabs-dev/opentabs). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 4 OpenTabs tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4 OpenTabs tools catalogued and risk-classified — across an index of 42,500+ MCP servers.