# Increase Tool Function Call Limit

**URL:** <https://community.retellai.com/t/increase-tool-function-call-limit/1919>\
**Category:** Support Help\
**Tags:** account-and-billing\
**Created:** [March 18, 2026, 5:44pm UTC](https://community.retellai.com/t/increase-tool-function-call-limit/1919 "2026-03-18T17:44:32Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![bryant](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/bryant/32/740_2.png) [@bryant](https://community.retellai.com/u/bryant)\
**Post date:** [March 18, 2026, 5:44pm UTC](https://community.retellai.com/t/increase-tool-function-call-limit/1919/1 "2026-03-18T17:44:32Z")

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Hi, we understand the function tool call is capped at 15k characters. Would it be possible to increase this for us? We understand it could potentially degrade performance but we are fine with this tradeoff.

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**Author:** ![support2](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/support2/32/15_2.png) [@support2](https://community.retellai.com/u/support2)\
**Post date:** [March 18, 2026, 5:54pm UTC](https://community.retellai.com/t/increase-tool-function-call-limit/1919/2 "2026-03-18T17:54:49Z")

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Thank you for reaching out to Retell AI Support. We’ve received your ticket and our team will respond within 8 hours.  
 ![](https://canada1.discourse-cdn.com/flex008/uploads/retell1/original/1X/f790e262d20d980f4c847beba41a60ec3c6dbcee.png)

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**Author:** ![support2](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/support2/32/15_2.png) [@support2](https://community.retellai.com/u/support2)\
**Post date:** [March 18, 2026, 5:54pm UTC](https://community.retellai.com/t/increase-tool-function-call-limit/1919/3 "2026-03-18T17:54:57Z")

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Hi Retell,

Thank you for your feature request to increase the function tool call character limit. To help us better understand your needs, could you please provide:

- A brief description of how you plan to use this increased limit and the problem it will solve.
- An identifier such as a Call ID, Agent ID, or Organization ID where this change would be applied.
- How critical this capability is for your operations (for example, critical, high, medium, or low priority).

Best,  
Evy AI  
AI Support Agent @ Retell AI  
 ![](https://canada1.discourse-cdn.com/flex008/uploads/retell1/original/1X/f790e262d20d980f4c847beba41a60ec3c6dbcee.png)

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<div class="post-metadata">

**Author:** ![bryant](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/bryant/32/740_2.png) [@bryant](https://community.retellai.com/u/bryant)\
**Post date:** [March 18, 2026, 5:59pm UTC](https://community.retellai.com/t/increase-tool-function-call-limit/1919/4 "2026-03-18T17:59:33Z")

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Hi, we currently have a few function calls that go over the limit (not by much), but it is critical to our operations as we scale. Our org\_id is: org\_zeQMzF70PiQXJk2t

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<div class="post-metadata">

**Author:** ![bryant](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/bryant/32/740_2.png) [@bryant](https://community.retellai.com/u/bryant)\
**Post date:** [May 7, 2026, 7:54pm UTC](https://community.retellai.com/t/increase-tool-function-call-limit/1919/5 "2026-05-07T19:54:56Z")

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Hi, just wanted to bump this thread