MCP Tool Reference Medium Risk

fill

Input text into fields

Part of the Chrome DevTools MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.

ChromeDevTools/chrome-devtools-mcp Write

WHEN AI AGENTS USE THIS TOOL

AI agents use fill to create or modify resources in Chrome DevTools. 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.

WHY ENFORCE A POLICY ON FILL

Without a policy, an AI agent could call fill repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Chrome DevTools.

RECOMMENDED POLICY

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

chrome-devtools.yaml 
tools:
  fill:
    rules:
      - action: allow
        rate_limit:
          max: 30
          window: 60

See the full Chrome DevTools policy for all 29 tools.

DETAILS

Tool Name

fill

Category

Write

MCP Server

Chrome DevTools MCP Server

Risk Level

Medium

MORE CHROME DEVTOOLS TOOLS

click Write
Click on elements
drag Write
Drag elements
fill_form Write
Complete entire forms
handle_dialog Write
Manage browser dialogs
hover Write
Trigger hover states
press_key Write
Simulate keyboard input
type_text Write
Enter text character-by-character
upload_file Write
Handle file uploads

View all 29 tools →

SIMILAR WRITE TOOLS ON OTHER SERVERS

create_table Airtable
Create a new table with fields
update_table Airtable
Update a table's name or description
create_field Airtable
Add a new field to a table
update_field Airtable
Modify an existing field
create_record Airtable
Add a new record
update_record Airtable
Modify an existing record

RELATED READING

FREQUENTLY ASKED QUESTIONS

What does the fill tool do?

Input text into fields. It is categorised as a Write tool in the Chrome DevTools MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on fill?

Add a rule in your Intercept YAML policy under the tools section for fill. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Chrome DevTools MCP server.

What risk level is fill?

fill is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit fill?

Yes. Add a rate_limit block to the fill rule in your Intercept 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.

How do I block fill completely?

Set action: deny in the Intercept policy for fill. 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.

What MCP server provides fill?

fill is provided by the Chrome DevTools MCP server (ChromeDevTools/chrome-devtools-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

ENFORCE POLICIES ON CHROME DEVTOOLS

Open source. One binary. Zero dependencies.

VIEW ON GITHUB Full Chrome DevTools policy →