Write a completed UML diagram HTML file to disk. Call this AFTER generating the HTML content for a use case, class, or state diagram. Do NOT attempt to open or display the file yourself — just tell the user the saved path and instruct them to open it in their browser.
Accepts file system path (filename)
Part of the Sad MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use uml_write_file to create or modify resources in Sad. 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 uml_write_file 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 Sad.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
uml_write_file:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Sad policy for all 15 tools.
Agents calling write-class tools like uml_write_file 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.
Write a completed UML diagram HTML file to disk. Call this AFTER generating the HTML content for a use case, class, or state diagram. Do NOT attempt to open or display the file yourself — just tell the user the saved path and instruct them to open it in their browser.. It is categorised as a Write tool in the Sad 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 uml_write_file. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Sad MCP server.
uml_write_file 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 uml_write_file 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 uml_write_file. 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.
uml_write_file 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.