Validate a BPMN diagramModel JSON before rendering. Returns either 'Model valid' with stats, or a list of specific issues to fix (wrong enums, unknown references, empty-pool violations, missing start events, merge/split type mismatches, etc.). Call this iteratively: fix issues, call again, until ...
Part of the Sad MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents call bpmn_validate_model to retrieve information from Sad without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though bpmn_validate_model only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
tools:
bpmn_validate_model:
rules:
- action: allowSee the full Sad policy for all 15 tools.
Agents calling read-class tools like bpmn_validate_model have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.
Validate a BPMN diagramModel JSON before rendering. Returns either 'Model valid' with stats, or a list of specific issues to fix (wrong enums, unknown references, empty-pool violations, missing start events, merge/split type mismatches, etc.). Call this iteratively: fix issues, call again, until valid. Then call bpmn_render. This check runs locally — no API cost.. It is categorised as a Read tool in the Sad MCP Server, which means it retrieves data without modifying state.
Add a rule in your Intercept YAML policy under the tools section for bpmn_validate_model. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Sad MCP server.
bpmn_validate_model 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 bpmn_validate_model 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 bpmn_validate_model. 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.
bpmn_validate_model is provided by the Sad MCP server (sad-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.