Compare two PDFs page by page (by absolute page index) and report text differences. Returns identical:true when text matches. Diffs content-stream-order text (not visual reading order), so it is best for same-layout documents; reflowed or multi-column PDFs produce noisy diffs. Inserting/deleting ...
Part of the Pdf Toolkit server.
Free to start. No card required.
AI agents use pdf_compare to create or modify resources in Pdf Toolkit. 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 pdf_compare 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 Pdf Toolkit.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"pdf_compare": {
"limits": [
{
"counter": "pdf_compare_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Pdf Toolkit policy for all 22 tools.
These attack patterns abuse exactly the kind of access pdf_compare 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.
Compare two PDFs page by page (by absolute page index) and report text differences. Returns identical:true when text matches. Diffs content-stream-order text (not visual reading order), so it is best for same-layout documents; reflowed or multi-column PDFs produce noisy diffs. Inserting/deleting a page shifts all later pages and reports them as changed. Large diffs are trimmed (truncated:true) to fit the response limit.. It is categorised as a Write tool in the Pdf Toolkit MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Pdf Toolkit MCP server in PolicyLayer and add a rule for pdf_compare: 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 Pdf Toolkit. Nothing to install.
pdf_compare 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 pdf_compare 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 pdf_compare. 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.
pdf_compare is provided by the Pdf Toolkit MCP server (@aryanbv/pdf-toolkit-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 22 Pdf Toolkit tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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