Type text character by character (simulates real typing). Use element_fill for faster input, use this for character-by-character typing simulation.
AI agents invoke keyboard_type to trigger actions in MCP Playwright Server. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.
This tool executes browser automation actions by simulating real keyboard input character by character. While it doesn't delete data or move money, it actively interacts with a browser session and could be used to type into forms, authentication fields, or other interactive elements, making it an Execute-category action with medium severity since its effects depend on what is being typed and where.
From the tool's definition 'Type text character by character (simulates real typing)' — triggers browser keyboard input actions that interact with the live browser environment
Attacks that exploit this kind of access
Type text character by character (simulates real typing). Use element_fill for faster input, use this for character-by-character typing simulation. It is categorised as a Execute tool in the MCP Playwright Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the MCP Playwright Server MCP server in PolicyLayer and add a rule for keyboard_type: 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 MCP Playwright Server. Nothing to install.
keyboard_type is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the keyboard_type 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 keyboard_type. 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.
keyboard_type is provided by the MCP Playwright Server MCP server (j0hanz/playwright-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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