Import a character from a saved JSON file into Google Flow.
AI agents use flow_import_character to create or update resources in Google Flow Browser MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Google Flow Browser MCP environment.
This tool creates or registers a new character object within Google Flow from external JSON data. While not destructive (the original file remains, and the action is reversible via deletion), it is a write operation that modifies the state of the system by adding a new entity.
From the tool's definition Tool description states 'Import a character from a saved JSON file into Google Flow' — importing data into a system creates or adds new objects (a character) that persist in the application.
Documented attack patterns abuse exactly the kind of access flow_import_character gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Google Flow Browser MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for flow_import_character:
{
"version": "1",
"default": "deny",
"tools": {
"flow_import_character": {
"limits": [
{
"counter": "flow_import_character_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}flow_import_character stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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Import a character from a saved JSON file into Google Flow. It is categorised as a Write tool in the Google Flow Browser MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Google Flow Browser MCP server in PolicyLayer and add a rule for flow_import_character: 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 Google Flow Browser MCP. Nothing to install.
flow_import_character 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 flow_import_character 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 flow_import_character. 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.
flow_import_character is provided by the Google Flow Browser MCP server (tmsss05/google-flow-browser-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Google Flow Browser MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
17 Google Flow Browser MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.