Merge a review-mode branch into contentrain. Local git operation — no external platform needed. Merges the feature branch into the contentrain branch, advances the base branch via update-ref, selectively syncs .contentrain/ files to the working tree, and prunes the merged branch. Target by exact ...
Part of the Contentrain server.
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AI agents use contentrain_merge to create or modify resources in Contentrain. 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 contentrain_merge 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 Contentrain.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"contentrain_merge": {
"limits": [
{
"counter": "contentrain_merge_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Contentrain policy for all 19 tools.
These attack patterns abuse exactly the kind of access contentrain_merge 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.
Merge a review-mode branch into contentrain. Local git operation — no external platform needed. Merges the feature branch into the contentrain branch, advances the base branch via update-ref, selectively syncs .contentrain/ files to the working tree, and prunes the merged branch. Target by exact "branch" name, or resolve by "model" (+ optional "locale"/"latest").. It is categorised as a Write tool in the Contentrain MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Contentrain MCP server in PolicyLayer and add a rule for contentrain_merge: 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 Contentrain. Nothing to install.
contentrain_merge 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 contentrain_merge 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 contentrain_merge. 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.
contentrain_merge is provided by the Contentrain MCP server (@contentrain/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 19 Contentrain tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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