Validate that a task list forms an acyclic DAG.
AI agents call validate_dag_acyclic to retrieve information from Dag Planner without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a structural validation operation on a DAG (directed acyclic graph) to verify it has no cycles. It is a pure inspection operation with no side effects: it does not create, modify, execute, delete, or move resources. It simply checks a property of existing data and returns the validation result. This is consistent with the Read category for tools that retrieve or query data without side effects.
From the tool's definition Tool name and description indicate it 'Validate[s] that a task list forms an acyclic DAG' — a read-only validation check that queries or inspects the structure of the DAG without modifying, executing, or deleting any data.
Attacks that exploit this kind of access
Validate that a task list forms an acyclic DAG. It is categorised as a Read tool in the Dag Planner MCP Server, which means it retrieves data without modifying state.
Register the Dag Planner MCP server in PolicyLayer and add a rule for validate_dag_acyclic: 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 Dag Planner. Nothing to install.
validate_dag_acyclic 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 validate_dag_acyclic 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 validate_dag_acyclic. 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.
validate_dag_acyclic is provided by the Dag Planner MCP server (shubhamnegi/dag-planner-mcp). 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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