Standardize and normalize Markdown syntax without changing the document's meaning. Re-formats headers (ATX-style), normalizes list markers to '-', enforces fenced code blocks with backticks, and applies consistent indentation. Side effects: when output_path is provided, writes the harmonized Mark...
Part of the Markdown server.
Free to start. No card required.
AI agents use harmonize_markdown to create or modify resources in Markdown. 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 harmonize_markdown repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Markdown.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"harmonize_markdown": {
"limits": [
{
"counter": "harmonize_markdown_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Markdown policy for all 34 tools.
These attack patterns abuse exactly the kind of access harmonize_markdown gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Standardize and normalize Markdown syntax without changing the document's meaning. Re-formats headers (ATX-style), normalizes list markers to '-', enforces fenced code blocks with backticks, and applies consistent indentation. Side effects: when output_path is provided, writes the harmonized Markdown to disk (creates parent directories as needed, overwrites existing files). When output_path is omitted, returns the harmonized text as a string with no file I/O. Returns: harmonized Markdown string (if no output_path), or JSON with { success, file_path, file_size_bytes, format } (if output_path set). Use this tool when you need to clean up inconsistent Markdown formatting before further processing. Prefer convert_to_md with harmonize=true if you also need to save the result, as it combines both steps. Not suitable for converting Markdown to other formats — use the convert_to_* tools instead.. It is categorised as a Write tool in the Markdown MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Markdown MCP server in PolicyLayer and add a rule for harmonize_markdown: 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 Markdown. Nothing to install.
harmonize_markdown 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 harmonize_markdown 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 harmonize_markdown. 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.
harmonize_markdown is provided by the Markdown MCP server (@xjtlumedia/markdown-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 34 Markdown tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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