Add a node to the knowledge graph. Nodes are the basic units of the graph, and different types of graphs support different types of nodes. Use cases: 1. Create component or module nodes in topology graphs 2. Add event or decision nodes in timeline graphs 3. Create requirement or feature nodes in ...
Accepts file system path (filePath)
Part of the Knowledge Graph Server MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use add_node to create or modify resources in Knowledge Graph Server. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.
Without a policy, an AI agent could call add_node repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Knowledge Graph Server.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
add_node:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Knowledge Graph Server policy for all 15 tools.
Agents calling write-class tools like add_node have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Add a node to the knowledge graph. Nodes are the basic units of the graph, and different types of graphs support different types of nodes. Use cases: 1. Create component or module nodes in topology graphs 2. Add event or decision nodes in timeline graphs 3. Create requirement or feature nodes in requirement documents 4. Build concept hierarchies in knowledge bases Usage recommendations: 1. First create the graph using create_graph 2. Select the appropriate node type based on graph type 3. Provide meaningful names and descriptions 4. Link related files when applicable 5. Add metadata for additional structured information Return data: - data: Created node information * id: Node ID * type: Node type * name: Node name * description: Node description * createdAt: Creation time. It is categorised as a Write tool in the Knowledge Graph Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Add a rule in your Intercept YAML policy under the tools section for add_node. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Knowledge Graph Server MCP server.
add_node is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the add_node rule in your Intercept 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 Intercept policy for add_node. 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.
add_node is provided by the Knowledge Graph Server MCP server (aiuluna/knowledge-graph-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept