pbi-webview2

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pbi_deep_snapshot

Inspect Power BI report page: get compact accessibility tree (role/name), DOM document count, or V8 heap usage. Select axtree, dom, or heap mode.

Instructions

Raw-CDP deep inspection of the reportView page. what:"axtree" (default) = a compact {role,name} projection of the full accessibility tree (capped to maxNodes, totalNodes reported); "dom" = a DOMSnapshot size probe ({documentCount, note}); "heap" = V8 heap usage ({usedMB, totalMB}). Read-only; safe.

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": "pbi_deep_snapshot"
  }
}

Input Schema

Name	Required	Description	Default
`what`	No	default "axtree"
`maxNodes`	No	axtree node cap (default 500)

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.0.0Jul 15, 2026

TDQS

A3.6/5.0

Behavior4/5

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

With no annotations, the description carries full burden. It declares the tool is 'Read-only; safe' and details the return structure for each mode (axtree cap, dom size probe, heap usage). No side effects or prerequisites are mentioned, but the read-only assurance is strong.

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 description is well-structured with clear sections for each mode using colons. It is verbose but includes essential details without unnecessary fluff. Front-loaded with the core purpose.

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?

Given no output schema, the description adequately covers return values for all three modes. Parameter descriptions are complete. Missing aspects like error handling or edge cases are minor, as the tool seems straightforward.

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

Parameters4/5

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

Schema coverage is 100%, so baseline 3. The description adds meaning by explaining the purpose of each mode ('compact projection', 'size probe', 'usage') and noting defaults ('default axtree', 'default 500' for maxNodes), going beyond the enum and type info.

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 tool performs a 'Raw-CDP deep inspection of the reportView page' and lists three specific modes with their outputs. It distinguishes itself from sibling pbi_snapshot by emphasizing 'deep' inspection, but does not explicitly contrast with it.

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 on when to use this tool over alternatives or on choosing between the three modes. The description does not provide context for usage decisions.

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