What the data for this category looks like
Urban gas ledger data primarily comes from station inspection systems, pressure regulating equipment SCADA monitoring systems, and user safety inspection and payment databases. Data is synchronized after daily inspection batches are completed. Full monthly ledgers are fully updated by the 5th of each month. Each individual ledger document includes fields such as station unique identifier, inspection time, pipeline pressure value, leak detection value, safety inspection result, user account number, and gas usage volume. Pressure is measured in kilopascals (kPa), and gas usage volume is measured in cubic meters (m³). Some ledgers also include the operating duration parameter for pressure regulating equipment.
Constraints Imposed by These Characteristics on Tool Calling and Plugins
Multiple data sources require tool calling to interface with at least three types of system interfaces at the same time, which increases the probability of call failures. Data updates occur at a high frequency, so set reasonable call intervals to avoid repeatedly pulling expired data. Fields include specific units and unique identifiers, so plugins must have field verification capabilities to ensure the accuracy of summarized data. The number of monthly ledger entries is large; pulling all data in a single call will trigger context overflow, so split data via paginated calls. Report generation requires sorting by station or time dimension, so tool return results must support custom rearrangement logic.
Configuration Settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
| Tool call timeout | 120–180 seconds | Gas ledger data involves multiple interfaces such as SCADA and inspection systems. Single interface response usually does not exceed 90 seconds, with reasonable redundancy reserved |
| Maximum number of entries per single tool call | First 200 entries | Single batch of gas ledger entries usually has fewer than 150 entries, to avoid excessive data volume in a single call triggering context limits |
toolChoice | auto | Allow the model to independently determine which plugins to call, adapting to the flexible needs of multi-source data pulling |
functionCall | Fixed trigger for gas ledger pulling function | Ensure the model only calls the specified plugin, avoiding result deviations caused by calling unrelated tools |
| Field format verification | Enabled | Verify formats such as pressure unit (kPa) and gas usage volume unit (cubic meters) for gas data, ensuring accurate summarized data |
Three Common Mistakes
- After calling a plugin, the model response is slow. The interface shows tool call duration exceeding 180 seconds, and the log returns a timeout status code. The cause is that the tool call timeout setting is too short, with no redundant duration reserved for pulling data from multiple system interfaces.
- The generated ledger report includes redundant non-core entries, and field sorting is chaotic. The cause is that the automatic rearrangement configuration for tool return results is not enabled, or the rearrangement trigger condition is not bound to the ledger data dimension.
- The platform returns the
400 Messages with role 'tool' must be a response to a preceding messageerror. The cause is that the tool call message sequence is not paired as required, and the tool response is returned directly without initiating a call request in advance.
How to Confirm the Configuration Is Correct
- Submit a test request for monthly urban gas ledger summary. Check the platform's tool call logs to confirm that all associated plugins are correctly triggered, with no timeout or error records.
- Generate a test report, and verify that the units of pressure value and gas usage volume in the report conform to gas industry standards, with no format errors.
- Trigger test data with abnormal unit values, confirm that the field verification switch is active, and the platform returns a clear format error prompt.
- Check the model call records to confirm that the
toolChoiceandfunctionCallconfigurations are correctly applied, with no records of unrelated plugins being called.
The values provided here are common starting points and should be evaluated against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.