connections_call
Call a connected tool (POST /v1/connections/{id}/tools/{tool}/call)
This record as markdown: /tools/onesi-genesis-mcp/connections-call.md
What connections_call does on Genesis
AI agents call connections_call to retrieve information from Genesis without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
id | string | Yes | Connection id (conn_ followed by 32 hex) |
body | object | Yes | |
tool | string | Yes | The tool's name in the pinned manifest |
approval | string | — | After a 428 APPROVAL_REQUIRED: the approval_request_id, once a human approved it in Auto. Sent as the OneOS-Approval header. |
Parameters from the server's own tool schema.
Why connections_call is rated Low
Even though connections_call only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Risk signalsAccepts raw HTML/template content (body)
Attacks that exploit this kind of access
The rule that runs connections_call safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Genesis, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For connections_call, this is the rule to start with:
connections_call is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Genesis, apply this rule, and every connections_call call is checked against it from then on.
Questions about connections_call
Call a connected tool (POST /v1/connections/{id}/tools/{tool}/call). It is categorised as a Read tool in the Genesis MCP Server, which means it retrieves data without modifying state.
connections_call accepts 4 parameters: id, body, tool, approval. Required: id, body, tool. The full parameter table on this page comes from the server's own tool schema.
Register the Genesis MCP server in PolicyLayer and add a rule for connections_call: 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 Genesis. Nothing to install.
connections_call 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 connections_call 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 connections_call. 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.
connections_call is provided by the Genesis MCP server (@onesi/genesis-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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