open_nodes
Open specific nodes in the knowledge graph by their names
This record as markdown: /tools/cowork-bench/open-nodes.md
What open_nodes does on Cowork Bench
AI agents call open_nodes to retrieve information from Cowork Bench without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why open_nodes is rated Low
The tool opens/retrieves specific nodes from a knowledge graph by name, which is a read operation with no side effects. No data is created, modified, or deleted.
From the tool's definition 'Open specific nodes in the knowledge graph by their names' — retrieves/queries data from a knowledge graph
Attacks that exploit this kind of access
The rule that runs open_nodes safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Cowork Bench, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For open_nodes, this is the rule to start with:
open_nodes 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 Cowork Bench, apply this rule, and every open_nodes call is checked against it from then on.
Questions about open_nodes
Open specific nodes in the knowledge graph by their names. It is categorised as a Read tool in the Cowork Bench MCP Server, which means it retrieves data without modifying state.
Register the Cowork Bench MCP server in PolicyLayer and add a rule for open_nodes: 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 Cowork Bench. Nothing to install.
open_nodes 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 open_nodes 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 open_nodes. 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.
open_nodes is provided by the Cowork Bench MCP server (0717376/cowork_bench). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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