mcp-bash

#!/usr/bin/env bash set -euo pipefail script_dir="$(cd "$(dirname "$0")" && pwd)" # Source SDK (MCP_SDK is set by the framework when running tools) # shellcheck source=../../../../../sdk/tool-sdk.sh disable=SC1091 source "${MCP_SDK:?MCP_SDK environment variable not set}/tool-sdk.sh" # shellcheck source=../../lib/roots.sh disable=SC1091 source "${script_dir}/../../lib/roots.sh" json_bin="${MCPBASH_JSON_TOOL_BIN:-}" if [[ -z "${json_bin}" ]] || ! command -v "${json_bin}" >/dev/null 2>&1; then mcp_fail -32603 "JSON tooling unavailable for argument parsing" fi path="$(mcp_args_get '.path // empty' 2>/dev/null || true)" if [[ -z "${path}" ]] && [[ $# -ge 1 ]]; then path="$1" fi # Accept bare-string arguments (some clients may send the path as a string instead of an object). if [[ -z "${path}" ]] && [[ -n "${json_bin}" ]]; then raw_args="$(mcp_args_raw)" if [[ -n "${raw_args}" ]]; then path="$("${json_bin}" -r 'if type=="string" then . elif type=="object" then .path // empty else empty end' <<<"${raw_args}" 2>/dev/null || true)" fi fi if [[ -z "${path}" ]]; then mcp_fail_invalid_args "Missing required argument: path" fi full_path="$(mcp_ffmpeg_resolve_path "${path}" "read")" # Validation: File exists → Tool Execution Error (LLM can choose a different file) if [[ ! -f "${full_path}" ]]; then mcp_result_error "$( mcp_json_obj \ error "File not found" \ path "${path}" \ hint "Check the file exists and is within allowed media roots" )" fi # Run ffprobe (capture stderr for error reporting) _stderr_file=$(mktemp) trap 'rm -f "$_stderr_file"' EXIT if output=$(ffprobe -v quiet -print_format json -show_format -show_streams "${full_path}" 2>"$_stderr_file"); then mcp_result_success "${output}" else _stderr=$(cat "$_stderr_file") mcp_fail -32603 "Failed to inspect media file: ${_stderr:-unknown error}" fi