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[GH-ISSUE #3576] [Bug] Failed to validate tool mcp_rea_build_call_path #1329

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opened 2026-10-16 21:04:20 +00:00 by bsakaguchi · 0 comments

bsakaguchi commented

2026-10-16 21:04:20 +00:00

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Originally created by @MaddoScientisto on GitHub (Oct 14, 2026).
Original GitHub issue: https://github.com/morluto/rea/issues/3576

Before submitting

I searched the open and closed issues for a related report.
I removed credentials, tokens, private paths, and sensitive target data.

Area

MCP or agent integration

Observed behavior

I try to run any request to use Rea, for instance on an existing session:

continue working on the next open verification items

The target is a windows PE executable

I receive this:

Failed to validate tool mcp_rea_build_call_path: Error: tool parameters array type must have items. Please open an issue
for the MCP server or extension which provides this tool

there are no meaningful logs in the MCP output

Environment:

Reproduction

can't reproduce reliably

Expected behavior

I expect the error to not happen

Impact and scope

Prevents MCP from working

REA version

6.5.0

Runtime and platform

Windows 11 Python 3.14 Node 26.3.0

Target and artifact context

Windows PE

Interface

MCP

Earliest failure stage

Unknown

Relevant output or evidence

no useful outputs other than the error above

Typed outcome or recovery expected

No response

Analysis or suspected cause

No response

Additional context

No response

Originally created by @MaddoScientisto on GitHub (Oct 14, 2026). Original GitHub issue: https://github.com/morluto/rea/issues/3576 ### Before submitting - [x] I searched the open and closed issues for a related report. - [x] I removed credentials, tokens, private paths, and sensitive target data. ### Area MCP or agent integration ### Observed behavior I try to run any request to use Rea, for instance on an existing session: > continue working on the next open verification items The target is a windows PE executable I receive this: > Failed to validate tool mcp_rea_build_call_path: Error: tool parameters array type must have items. Please open an issue > for the MCP server or extension which provides this tool there are no meaningful logs in the MCP output Environment: ### Reproduction can't reproduce reliably ### Expected behavior I expect the error to not happen ### Impact and scope Prevents MCP from working ### REA version 6.5.0 ### Runtime and platform Windows 11 Python 3.14 Node 26.3.0 ### Target and artifact context Windows PE ### Interface MCP ### Earliest failure stage Unknown ### Relevant output or evidence no useful outputs other than the error above ### Typed outcome or recovery expected _No response_ ### Analysis or suspected cause _No response_ ### Additional context _No response_

bsakaguchi

2026-10-16 21:04:20 +00:00

closed this issue
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bsakaguchi referenced this issue

2026-10-17 21:10:11 +00:00

[PR #1302] [MERGED] fix(contracts): advertise NUL as the hex escape strict validators accept #2782

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Reference

morluto/rea#1329

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