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playwright_put

Send HTTP PUT requests to update resources by specifying a URL and data payload. This tool enables modifying web content through browser automation.

Instructions

Perform an HTTP PUT request

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
urlYesURL to perform PUT operation
valueYesData to PUT in the body

Implementation Reference

  • The handler function for the 'playwright_put' tool. It performs a PUT request to the specified URL with the provided data using the Playwright API context, returns the response details or an error message.
    case "playwright_put":
      try {
        var data = {
          data: args.value,
          headers: {
            'Content-Type': 'application/json'
          }
        };
        var response = await apiContext!.put(args.url, data);
    
        return {
          content: [{
            type: "text",
            text: `Performed PUT Operation ${args.url} with data ${JSON.stringify(args.value, null, 2)}`,
          }, {
            type: "text",
            text: `Response: ${JSON.stringify(await response.json(), null, 2)}`,
          },
          {
            type: "text",
            text: `Response code ${response.status()}`
          }],
          isError: false,
        };
      } catch (error) {
        return {
          content: [{
            type: "text",
            text: `Failed to perform PUT operation on ${args.url}: ${(error as Error).message}`,
          }],
          isError: true,
        };
      }
  • The schema definition for the 'playwright_put' tool, specifying the input parameters: url (string) and value (string). This is part of the tools array returned by createToolDefinitions() used for MCP tool listing.
    {
      name: "playwright_put",
      description: "Perform an HTTP PUT request",
      inputSchema: {
        type: "object",
        properties: {
          url: { type: "string", description: "URL to perform PUT operation" },
          value: { type: "string", description: "Data to PUT in the body" },
        },
        required: ["url", "value"],
      },
    },
  • Helper constant listing API tools, including 'playwright_put', likely used for conditional resource management or browser launch decisions.
    export const API_TOOLS = [
      "playwright_get",
      "playwright_post",
      "playwright_put",
      "playwright_delete",
      "playwright_patch"
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries full burden. It states the action but doesn't disclose behavioral traits like authentication requirements, error handling, response format, rate limits, or side effects. For a mutation tool with zero annotation coverage, this is a significant gap.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, efficient sentence with zero waste. It's appropriately sized and front-loaded, clearly stating the tool's purpose without unnecessary elaboration.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given this is a mutation tool with no annotations and no output schema, the description is incomplete. It doesn't explain what the tool returns, error conditions, or important behavioral aspects. For a tool that performs HTTP PUT operations, more context is needed.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents both parameters (url and value). The description doesn't add any meaning beyond what the schema provides, such as examples or constraints. Baseline 3 is appropriate when schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Perform an HTTP PUT request') with a specific HTTP verb. It distinguishes from siblings like playwright_get, playwright_post, and playwright_delete by specifying the PUT method. However, it doesn't explicitly mention what resource it operates on beyond HTTP endpoints.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided about when to use this tool versus alternatives. The description doesn't explain when PUT is appropriate compared to POST, PATCH, or other HTTP methods, nor does it mention any prerequisites or context for usage.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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