Create a new character in Google Flow Characters with name and description.
AI agents use flow_create_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 new character assets within Google Flow, modifying the system state by adding persistent entities. It is reversible (characters can be deleted), so it qualifies as Write rather than Destructive.
From the tool's definition Tool description states 'Create a new character in Google Flow Characters with name and description' - the verb 'Create' and action of adding a new character entity demonstrates data creation with side effects.
Documented attack patterns abuse exactly the kind of access flow_create_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_create_character:
{
"version": "1",
"default": "deny",
"tools": {
"flow_create_character": {
"limits": [
{
"counter": "flow_create_character_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}flow_create_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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Create a new character in Google Flow Characters with name and description. 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_create_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_create_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_create_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_create_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_create_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.