Add or update specific files in the code graph without full reindex. USE WHEN: new files were created, existing files were modified, or you need specific files re-indexed immediately. Removes old data for each file before re-parsing — safe to call on already-indexed files. Resolves cross-file imp...
Part of the Codegraph server.
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AI agents use codegraph_index_files to create or modify resources in Codegraph. 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 codegraph_index_files 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 Codegraph.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"codegraph_index_files": {
"limits": [
{
"counter": "codegraph_index_files_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Codegraph policy for all 38 tools.
These attack patterns abuse exactly the kind of access codegraph_index_files 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.
Add or update specific files in the code graph without full reindex. USE WHEN: new files were created, existing files were modified, or you need specific files re-indexed immediately. Removes old data for each file before re-parsing — safe to call on already-indexed files. Resolves cross-file imports and rebuilds search indexes. Much faster than full reindex. Requires paths parameter (array of absolute file paths).. It is categorised as a Write tool in the Codegraph MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Codegraph MCP server in PolicyLayer and add a rule for codegraph_index_files: 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 Codegraph. Nothing to install.
codegraph_index_files 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 codegraph_index_files 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 codegraph_index_files. 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.
codegraph_index_files is provided by the Codegraph MCP server (codegraph-ai/CodeGraph). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 38 Codegraph tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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