list_mcp_resource_templates: schema validation error when server param is omitted

[ganyu143]

Bug Description

list_mcp_resource_templates throws a schema validation error when called without the optional server parameter.

Error:
Invalid schema for function 'list_mcp_resource_templates': null is not of type "array"

Steps to Reproduce

1. Run OpenCode 1.18.4 with any MCP server configured
2. Call list_mcp_resource_templates() without the server argument
3. The error above is thrown

Root Cause

The tool schema defines server as an optional string type, but when the parameter is omitted (null), the runtime validator incorrectly expects it to be an array type.

Workarounds (confirmed working)

1. Pass the server name explicitly: list_mcp_resource_templates(server="wiki") — works fine
2. Use list_mcp_resources instead (without "templates" suffix) — works fine

Environment

• OpenCode: 1.18.4
• OS: Linux
• Package: @vegamo/deepcode-cli