Watermark multiple images at once. Upload image URLs, apply text watermark, get a ZIP. Supports up to 20 images.
Part of the Markly server.
Free to start. No card required.
AI agents use markly_batch_watermark to create or modify resources in Markly. 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 markly_batch_watermark 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 Markly.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"markly_batch_watermark": {
"limits": [
{
"counter": "markly_batch_watermark_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Markly policy for all 4 tools.
These attack patterns abuse exactly the kind of access markly_batch_watermark 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.
Watermark multiple images at once. Upload image URLs, apply text watermark, get a ZIP. Supports up to 20 images.. It is categorised as a Write tool in the Markly MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Markly MCP server in PolicyLayer and add a rule for markly_batch_watermark: 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 Markly. Nothing to install.
markly_batch_watermark 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 markly_batch_watermark 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 markly_batch_watermark. 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.
markly_batch_watermark is provided by the Markly MCP server (markly-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 4 Markly tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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