Search for nodes in the document using semantic or text queries
AI agents call query_nodes to retrieve information from AI-Canvas MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool performs a search/query operation to retrieve information about design nodes in the document. It has no side effects, does not modify data, execute code, delete content, or commit financial transactions. This is a straightforward Read category tool with minimal security risk.
From the tool's definition Tool is described as 'Search for nodes in the document using semantic or text queries' — a retrieval operation with no modification or execution of code/commands.
Attacks that exploit this kind of access
Search for nodes in the document using semantic or text queries. It is categorised as a Read tool in the AI-Canvas MCP Server MCP Server, which means it retrieves data without modifying state.
Register the AI-Canvas MCP Server MCP server in PolicyLayer and add a rule for query_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 AI-Canvas MCP Server. Nothing to install.
query_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 query_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 query_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.
query_nodes is provided by the AI-Canvas MCP Server MCP server (laoluojuhai/ai-canvas). 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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