What the data for this category looks like
Minor metals industry data primarily comes from monthly industry briefs published by the Non-Ferrous Metals Industry Association Minor Metals Branch, daily quotes from professional spot trading platforms, monthly import and export statistics from the General Administration of Customs, and public financial reports from leading mining enterprises. Update frequencies vary: spot quotes are updated daily, industry briefs are updated weekly or monthly, and customs data is released with a 1-2 calendar month delay. Documents typically include fields such as product name, specification grade, origin, daily transaction average price, weekly month-over-month change, monthly year-over-year change, downstream application proportion, total inventory, and more. Units are mostly yuan/ton, ten thousand tons, and percentage.
What constraints do these characteristics impose on tool calling and plugins?
Data sources are scattered and update frequencies differ greatly. Multi-source tool aggregation logic must be configured, while handling field mapping and unit conversion across different data sources. Monthly report documents are lengthy, so reasonable chunked parsing parameters must be configured to avoid truncating critical data. Parameter differences across minor metal categories are significant, so tool calling configurations that support dynamic category selection must be enabled. Additionally, the lag in customs data requires marking data update times in due diligence reports to avoid misleading users.
How to set the configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
tool_call_timeout | 300 seconds | Minor metal spot data interfaces respond quickly, but industry report interfaces have high latency due to large data volumes. 300 seconds covers most scenarios |
multi_source_merge_strategy | Weighted average by timestamp | Different data sources have varying update frequencies. Weighted balancing balances real-time performance and data authority |
file_upload_max_size | 500 MB | Minor metal due diligence reports are mostly in PDF or Excel format. A single report is typically no larger than 200 MB, so this value reserves reasonable redundant space |
parse_chunk_size | 800–1200 characters | Field descriptions in minor metal reports are mostly short sentences. This chunk length preserves field relevance and avoids truncating critical parameters |
tool_call_retry_count | 2 times | Some spot platform interfaces have occasional fluctuations. Retries reduce the probability of call failures |
custom_field_mapping | Preset mapping table by category | Differences in field names across data sources are significant. Preset mappings unify output formats to meet due diligence report generation requirements |
The parameter values provided on this page are common starting points for configuration. Actual values are affected by material form, data volume, and business rules. Specific issues require individual analysis. It is recommended to test on your own samples before finalizing settings.
Three common mistakes
- Symptom: File upload interface returns
413 Request Entity Too Large. Cause: Thefile_upload_max_sizeconfiguration was not adjusted, and the default value cannot accommodate the file size of minor metal due diligence reports. - Symptom: MCP host fails to load line chart HTML content generated by pyecharts. Cause: HTML content was not encapsulated according to MCP specifications. Returning raw HTML does not meet response format requirements.
- Symptom: Intermediate card content from tool calls is directly output to users. Cause: The
show_tool_call_detailconfiguration was not disabled, causing debug logs to not be filtered.
How to confirm configurations are correct
- Upload a 200 MB PDF of a minor metals industry report, verify that it can be parsed normally and standardized fields are extracted.
- Call a spot data interface, verify that returned fields are automatically mapped to the preset standardized format, with units unified to yuan/ton.
- Initiate a complete tool calling workflow, verify that the final output only contains organized due diligence report content, with no intermediate calling logs.
- Trigger the line chart generation tool, verify that the returned content can be rendered normally on the MCP host.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.