[BUG] Anti-gravity models fail with enum TYPE_STRING validation error in memory_rate_memory tool #8034

Description

When using anti-gravity models in OpenCode, the following validation error occurs:

Invalid value at 'request.tools[0].function_declarations[33].parameters.properties[1].value.enum[0]' (TYPE_STRING), -1
Invalid value at 'request.tools[0].function_declarations[33].parameters.properties[1].value.enum[1]' (TYPE_STRING), 0
Invalid value at 'request.tools[0].function_declarations[33].parameters.properties[1].value.enum[2]' (TYPE_STRING), 1

Root Cause

The memory_rate_memory tool (function_declarations[33]) has a rating parameter with numeric enum values [-1, 0, 1], but the anti-gravity model API requires enum values to be strings, not numbers.

Expected Behavior

The tool should work with anti-gravity models without validation errors.

Actual Behavior

Anti-gravity models reject the tool schema due to type mismatch in enum values.

Proposed Solution

Update the memory_rate_memory tool definition to use string enum values:

• Change enum: [-1, 0, 1] to enum: ["-1", "0", "1"]
• Or remove the enum constraint and use type validation with description

Environment

• OpenCode version: latest
• Model provider: Anti-gravity models
• Platform: Linux

Additional Context

This issue only occurs with anti-gravity models. Other model providers appear to have more lenient schema validation and accept numeric enum values.