Zambo

PDF Extract

pdf_extract

Read-onlyIdempotent

Fetch and extract text content from any public URL - PDF documents, web pages, articles, docs. Returns the extracted text, word count, and a summary. Works on research papers, contracts, articles, reports. Use when user says 'read this PDF', 'extract from this URL', 'summarize this document', 'what does this say'.

Input Schema

TableJSON Schema

Name	Required	Description
`url`	Yes	Public URL to the document or webpage to extract and summarize.
`max_chars`	No	Max characters of raw text to return (default: 4000, max: 8000).
`summarize`	No	Also generate an AI summary. Default: true.
`_zambo_key`	No	Optional opaque Zambo access capability. Never place it in a URL or public log.
`_session_id`	No	Optional stable bot-job ID. Reuse it across calls to bind a Day Pass and keep the job ledger together.
`_caller_label`	No	Optional caller label recorded as a caller-reported claim in the receipt.
`_continuity_ai_label`	No	Optional self-reported AI client label for the private continuity timeline. Zambo does not independently verify the client.

Output Schema

TableJSON Schema

Name	Required	Description	Default
`result`	Yes	The tool's observed JSON value or plain-text result.

Schema Changelog

Changes observed during successful MCP inspections.

Changed3 schema fields changedOct 10, 2026

changedInput schema / properties / _caller_label / description

Previous value: -"Optional self-reported caller label. It is recorded as a claim, not independently verified."New value: +"Optional caller label recorded as a caller-reported claim in the receipt."

changedInput schema / properties / _session_id / description

Previous value: -"Optional stable Zambo session ID used to preserve continuity across tool calls."New value: +"Optional stable bot-job ID. Reuse it across calls to bind a Day Pass and keep the job ledger together."

addedInput schema / properties / _zambo_key

Added value: +{
+  "description": "Optional opaque Zambo access capability. Never place it in a URL or public log.",
+  "maxLength": 160,
+  "type": "string"
+}

Changed4 schema fields changedOct 10, 2026
- changedOutput schema / additionalProperties
```
Previous value: -trueNew value: +false
```
- addedOutput schema / properties / result / description
```
Added value: +"The tool's observed JSON value or plain-text result."
```
- removedOutput schema / properties / result / type
```
Removed value: -"string"
```
- addedOutput schema / required
```
Added value: +[
+  "result"
+]
```

Changed2 schema fields changedOct 10, 2026

addedInput schema / properties / _caller_label

Added value: +{
+  "description": "Optional self-reported caller label. It is recorded as a claim, not independently verified.",
+  "maxLength": 80,
+  "type": "string"
+}

addedInput schema / properties / _session_id

Added value: +{
+  "description": "Optional stable Zambo session ID used to preserve continuity across tool calls.",
+  "maxLength": 64,
+  "type": "string"
+}

AddedOct 2, 2026

TDQS

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