search_digital_signatures Leave feedback

search_digital_signatures returns the details behind each digital signature: signer name, issuer, certificate serial number, validity period, signing timestamp, validity status, and any reason or comment attached. This is the tool for “who signed this, when, and with what?”

Tool description (as the AI agent sees it):

Searches a document for digital certificate signatures and returns details for each: signer name, issuer, certificate serial number, validity period, sign timestamp, validity status, and any comments or reason attached to the signature. Supports PDF and Office documents (DOCX, XLSX, PPTX). Do NOT pre-check whether the file exists — pass the filename the user provided directly. Returns a JSON object with found (count) and signatures (array with signTime, isValid, comments, thumbprint, and a nested certificate object). On failure, the response text starts with ‘Digital signature search failed for’ followed by the underlying exception type, message, and inner-exception chain.

{
  "name": "search_digital_signatures",
  "arguments": {
    "file": {
      "filePath": "contract_signed.pdf"
    }
  }
}

A JSON array, one entry per digital signature, with signer, issuer, serial number, validity window, timestamp, status, and comments.

Where verify answers valid or not, this answers by whom and under what certificate — the data an audit trail actually needs. Supported on PDF and Office formats (DOCX, XLSX, PPTX).

On failure the text starts with Digital signature search failed for, followed by the exception type and message.

• “Who signed this contract, and when?”
• “Show me the certificate details for every signature.”
• “Has the signing certificate expired?”