JobSheet MCP Server and API by Cotlet

Open the browser

cotlet_browser_open

Read-only

Starts the user's Cloud Browser (a real Chrome on Cotlet, where the user is signed in to their sites) and opens url. Call it first. The URL goes to the site's open tab, else to a new tab, so the user's own tabs stay. Answers the page after it: the elements and text in view, with the same numbers. In JobSheet it serves these actions: Create job sheet, Create quote, Create invoice, Import company from Companies House, List job sheets.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "cotlet_browser_open"
  }
}

Input Schema

Name	Required	Description	Default
`app`	No	Leave it out: the step runs in the user's web browser. Only when cotlet_app_guide names an app's own Cloud Browser, that app's slug, e.g. milanote.
`url`	No	A public http or https address, e.g. https://example.com.

Schema Changelog

Changes observed during successful MCP inspections.

First observedNov 9, 2026

TDQS

A4.1/5.0

Behavior4/5

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

Beyond the annotations, it discloses that the browser is a real Chrome where the user is signed in, that the URL reuses the site's open tab or opens a new tab, that the user's own tabs remain, and that it returns the visible page elements and text. It does not cover failure modes or permission prompts, but it adds rich behavioral context beyond the structured hints.

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

Conciseness4/5

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

The definition is front-loaded with the core action and keeps the most important behavioral details early. The list of JobSheet actions is useful context but is somewhat product-specific and slightly over-extends a generic browser tool description.

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

Completeness4/5

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

For a two-parameter browser tool with full schema coverage and no output schema, the description covers the first-step role, authentication context, tab behavior, and page result. It is largely complete, though it could say more about what happens if the browser session cannot start.

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 coverage is 100%, so both the url and optional app parameters are already documented. The description adds some tab-targeting context for url, but it does not explain the app parameter or add much meaning beyond the schema baseline.

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

Purpose5/5

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

The description states a specific verb and resource: it starts the user's Cloud Browser and opens the given url. The phrase 'Call it first' clearly establishes this as the entry point before the other browser tools.

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

Usage Guidelines4/5

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

It explicitly says to call this first and lists concrete JobSheet actions it serves, giving clear usage context. It does not name alternatives or exclusions, such as when to use cotlet_browser_navigate instead, so it falls short of full routing guidance.

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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